
Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

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I went hard with the thermarest topo XL. Comfiest air mattress I've ever fucked used.
By "better," do you mean more comfortable? If so, check out Thermarest NeoLoft regular wide or large, depending on your height. 4.6" thick, 4.7 R-value. I have the NeoAir Topo Luxe (4" loft), which it replaced and which is by far the most comfortable backpacking pad I've ever used.
Follow your instincts. You will not find a pad (which qualifies as a backpacking pad) more comfortable than NeoLoft. The closest is the discontinued NeoAir Topo Luxe, which NeoLoft replaced. Pro tip: Buy the NeoAir Micro Pump
My favorite 3-season pad in terms of comfort is the (discontinued) NeoAir Topo Luxe, wide (25") version. It's 4" thick and way more comfy than any other pad I've tried. 3.7-value, which is okay for most 3-season use. When on snow or frozen ground, I place a closed-cell foam pad on top, which boosts its R-value to 5.5, which is sufficient. In winter, I use an inflatable 3" thick pad with >6.5 R-value, but it's not as comfy as my Topo Luxe. Topo Luxe has been replaced with the NeoLoft pad, which is 4.6" thick, 4.7 R-value and has side rails to keep you centered on the pad. I have not spent a night on one, but I've tried them out, and they may well be even more comfy than my Topo Luxe. Wide (25" or 26") is now a requirement for me. I carried lighter pads when I was younger, but my aging hips and back do much better with a 4" pad vs. a 2.5" or 3" pad.
If you prioritize comfort, there are deals on the (discontinued) ThermaRest NeoAir Topo Luxe, 4" thick, 3.6 R-rating. Unless you are small, I recommend the wider (25") models. I also recommend pairing it with a NeoAir Micro Pump. I am dismayed that the Topo Luxe has been discontinued, apparently replaced by the NeoLoft, which is a bit heavier, thicker (4.6") and warmer (4.7 R-rating).
Have used a Therm-A-Rest Neoair Topo Luxe Balsam Large since 2022. 3.7R value, 4" "tall" so you can let out some air to get comfortable. Sleep on the side and stomach mostly. When really cold I'll pack a Therm-a-Rest Z-lite Sol which is 5.7R value combined. 680 grams ish (1.5lb), compact and easy to deflate. To inflated it I just being a Aerogogo GIGA Pump 4.0, which is awesome
Neo air topo. Just fab.
I would have said that Thermarest Large LuxuryMap was the most comfortbale (individual) mat, but their valve system sucks! It eats rubber o-rings.
I'm pretty much exactly like you. Tried and DONT LIKE: Therm-a-Rest NeoAir Topo Luxe. It's thick! But the horizontal baffles suck for side sleepers. Sea to Summit Comfort Plus Insulated. Not thick enough. Hip pain. Noisy. The one I want to try next: Therm-a-Rest NeoLoft.

Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

Exped
Ultra Series
Lightweight side-sleeper comfort, but a bit pricey and bulky.

NEMO
Tensor Series
Ultralight side-sleeper comfort, but slippery and prone to leaks.

Big Agnes
Rapide SL Insulated Sleeping Pad
Comfortable with side rails, but heavy and warmth claims disputed.

Therm-a-Rest
NeoLoft™ Sleeping Pad
Very comfortable, good service, but heavy and bulky for backpacking.

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Therm-a-Rest - NeoAir Xtherm Series