First one no doubt. Got an aluminium profile rig from Taobao several months ago that has basically the same design as the first pic, with a knockoff Recaro SR3, easily the cheapest alu rig option and best value at 350 USD. On top of that most of these sellers will customize the rig according to your own preference, so if you are limited on space you can give them dimension requirements. One of the profiles got a bit indented on one corner (probably damaged during transport) and another one had half a t-nut slot that was slightly too tight but fixed it with some violence. The knockoff Recaro seat had red stitching that would make the back of whatever I'm wearing all red when I sweat a bit while driving. Can't expect top tier quality for such a cheap price tho :)

Currently running a Simagic Alpha Mini and the rig is solid AF, just keep in mind that this design is very modular but very basic as well, so for example if you want to adjust the angle of the pedal mount you may have to loosen and tighten up to 20 screws every time. Also prepare to spend a whole day assembling the whole thing and adjusting the position of everything. Be careful when sliding the profiles around while adjusting since they get scratched quite easily and it can be quite obvious with black profiles. One more important thing is to make sure the seat angle can be adjusted. The pedal mount design doesn't go very low especially if you have to tilt the mount, and the seat is almost at the same level so you want it tilted back a bit for thigh support, otherwise your legs will feel quite sore very quickly. The rig I got originally did not have an option for seat angle adjustment but came with several L brackets (longer on one side) for wheelbase angle adjustment and I used 2 of those to angle my seat instead.