I was fortunate to get a Helinox, the original they’re copied from, fairly cheap a few years ago. Lots of friends have the cheaper copies. Mostly they’re just fine, the most likely issue is that the little rubber feet fall off. However, if you are using it a lot (as I do), the extra may be worth spending, especially if you could get a discount. Mine has proven to be extremely tough and durable, and has been dragged all over Britain and bits of Scandinavia. For more occasional use, the rest all seem suspiciously similar!
One thing to note. All of them suffer from sinking in soft ground. There are various solutions to this, from tennis balls stuck on the feet, via struts of wood fastened to them, and jam jar lids. I don’t bother with any of them, so allow my friends the entertainment of watching me sink, normally back feet first…