
Joolz
Aer+
Travel-friendly, city-nimble, but tiny storage and struggles off-pavement.

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I bought a mountain buggy duet V3 because it was as wide as a single, 1-handed collapse and auto lock, and my eldest was able to fit in it until they were 4yo. It was great on tarmac and on rough terrain. I loved the hand break on the handle when I needed it. Both kids were world facing, which was nice as there were no arguments when my youngest got older. You could grab one cheaper off Ebay. The ride was really smooth, too, due to the big tires and suspension.
This guy.. all the way: [https://uk.mountainbuggy.com/products/duet?srsltid=AfmBOoonO8Ijg5hhjAXdcbxwxp-IY3-7Psd6d2vM0MJNFB9zMuSMF0rq](https://uk.mountainbuggy.com/products/duet?srsltid=AfmBOoonO8Ijg5hhjAXdcbxwxp-IY3-7Psd6d2vM0MJNFB9zMuSMF0rq) Soooo good. You absolutely need one buggy for both babies. When they were teeny weeny we had one that the baby carseats just snapped into, so you could whip them in and out of the car without waking them up/actually moving them. The actually buggy was horrendous though (despite being almost a thousand pounds).
We started with a tandem that worked with the newborn car seats we had. It was super expensive. And it was *awful*. Not only did I dislike the lack of parity but it was heavy and difficult to steer. We ended up with a Mountain Buggy Duet which is just wonderful, I can literally push and steer it with one finger, and is the narrowest (in the UK) side-by-side, so it fits through pretty much every doorway, which was my original concern. Now they are toddlers... I can't imagine having the tandem, it would be the worst, so isolating and weird. They love sitting next to each other. In short, tandems suck for twins.
I know you found one but I like the mountain buggy v3…. Not only does it lie flat, suitable for newborns, but it can accept ANY newborn or infant car seat … it has a seatbelt like strap attached so you can put your car seat on it and securely attach it. Great if you are ever travelling with a car seat
It's going to depend so much on how and where you plan to use the stroller, and whether you want something that can eventually be used for a second baby. I don't drive and we knew we wanted 2 kids, so I needed strollers that really worked well and had okay storage capacity. I went through a few different strollers to accommodate different activities and different life stages. All of them were used in conjunction with babywearing because sometimes in the city a stroller just doesn't work at all. I got a City Select first because I wanted something I could convert when we had a second, and the versatility was nice, but all the front to back strollers are so unwieldy to push. Having a tiny baby facing me (preferably not in a car seat) was important to me, and it was a good choice for that, but once both kids were bigger I sold it. I also had a not-quite-umbrella stroller, the Zoe that isn't the super tiny travel size, for those days I wanted to keep it light and only needed it for one kid, but they're really only well suited to smooth floors, like museums, so I only used it if I really needed something small and easy to fold. My second set of strollers, once I knew we weren't gonna have anymore newborns, were a City Mini GT and a Mountain Buggy Duet. The GT is a really solid choice as long as your kid is old enough that you feel comfortable not having eyes on them at all times. Sturdy, handles well, basket is not amazing but it's good enough, folds quickly, and they're popular enough that it's easy to find one used - I think mine was $20 on craigslist and all I had to do was stuff a little piece of cardboard into a spot where the front wheel liked to stick. The Mountain Buggy Duet is relatively unknown but my absolute favorite for when I needed both kids in a stroller. Rugged as hell, smooth to push even with one hand, amazingly shockingly astoundingly narrow for a side by side - I think there's less than an inch difference between it and the City Select single. You can fit this thing on a CTA bus without folding it or blocking the aisle (I did avoid crowded buses with strollers but I surprised a lot of people when they saw it squeeze in). You can take one seat off and attach a shopping basket if you've got one in preschool all day and the other at home with you running errands then put the second seat back in for a weekend zoo trip. It was a pain to fold but I rarely needed to fold it. It's not the best stroller for big kids since it's so narrow, but my oldest was a shrimpy toddler. God, I miss that stroller. If I knew then what I know now I probably would have gotten it and just used it with the basket when my first was born. I also borrowed a Bob double to get the kids to and from school when we were avoiding the bus during covid and it snowed and snowed and snowed and snowed one winter. It did well in the snow but it's so so big, I couldn't even get it in my garage without folding it. If you plan to do a lot of trail walking off road kinds of stuff, a single Bob would be a great choice once baby is big enough, but I wouldn't bother for just city walking.
Have a look at the Mountain Buggy duet. It is narrower than the Bugaboo Donkey, has a twin bassinet attachment, and when you attach two car seats they are kind of staggered so it doesn't add to the width of the buggy.
I may have missed you say where you are but here in London, UK my Mountain Buggy Duet is a really tight squeeze in some older lifts (elevators) with the car seat attachment. I do love it and highly recommend it though! A Donkey would never fit into the lift I need to take in the local library!
I just bought a used Duet and spent WEEKS trying to find clip 31 that allows two Maxi car seats. They don’t make the clip anymore and we didn’t want the universal ones since it’s just straps. Something to keep in mind when looking.

Joolz
Aer+
Travel-friendly, city-nimble, but tiny storage and struggles off-pavement.

Bugaboo
Butterfly Series
Durable, compact for city travel, good storage, but expensive.

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UPPAbaby
Minu V3 Stroller
Compact travel, decent storage, but pricey, seat not upright.

UPPAbaby
Cruz V3
Durable, massive storage, great service, but heavy and bulky.

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