Kappa.@Jacopokpp
The cost of a SuiPlay0x1 from what I found is around $650, so let's compare it to a Steam Deck OLED (512GB) which is around 659$.
Display:
OLED > IPS and also larger (7.4'' vs 7'' of the 0x1)
0x1 has better resolution 1920x1200 vs 1280x800
While the higher resolution gives more details since you have more pixels but for gaming, OLED often looks better thanks to its infinite contrast, vibrant colors, and near-instant pixel response; because black pixels are off, dark content can use less power and extend battery life.
(Also not clear what is the 0x1 refresh rate)
Storage:
Basically the same, both come with 512GB SSD NVMe.
The Steam Deck also comes with a microSD slot to increase storage.
Battery:
0x1 has faster recharge with the 65W PD charge, but the Steam Deck using <60W PD charge means you can use a standard 3 A cable which is cheaper, for the 65W PD you need a 5 A certified cable which costs twice a standard 3 A usually, depending on brand.
Connectivity:
Same, both offer WiFI6e and BT5.2
RAM:
Here there are some missing information, Sui0x1 doesn't declare the bus structure. Because if it's a dual channel 128bit which is typical for the Ryzen 7 7840U then it has better RAM performances (Steam Deck 6400 MT/s x 128 / 8 = 102 GB/s) vs (SuiPlay 0x1 7500MT/s x 128/8 = 120 GB/s) . But if it's a bus capacity of 64bit than the RAM read speed drops to 60 GB/s, which is way lower than the Steam Deck one.
Being optimistic let's give this one to the SUI 0x1.
Processor:
0x1 has a AMD Ryzen 7 7840U which is better than the APU of the Steam Deck which mounts a CPU: Zen 2 4c/8t, 2.4-3.5GHz (up to 448 GFlops FP32) and a
GPU: 8 RDNA 2 CUs, 1.6GHz (1.6 TFlops FP32) [copy pasted this info from the steam deck website]
While the processing power of the AMD wins over the Steam Deck processing units we need to take into account 1) 0x1 has to cover more pixels because of the higher resolution 2) higher energy cost
Steam Deck APU 4–15 W
vs
0x1 Ryzen 15-30 W
So the advantage in power comes with a decent tradeoff which can result in a very limited advantage in FPS.
Last thing: Buttons.
Steam Deck mounts way more buttons that also allow you to have more accessibility and customization for different preferences, it also comes with 2 track pads which are pretty nice to use in Desktop mode, symmetrical sticks > asymmetrical ones (my opinion, looks very uncomfortable, also why I don't like the Nintendo Switch).
SD also has 4 assignable grip buttons, great when you play racing games or need multiple buttons for more diverse actions, but not much of a difference on most games.
Overall I'd say a Steam Deck OLED at that price range is way better, throw in 100€ more and you have twice the storage.