I have the N1201SA, MiniVNA Tiny and a NanoVNA v2. I get the best results with the MiniVNA Tiny, but it is also much more expensive (Like $300). There is a learning curve associated with the NanoVNA v2 and in my opinion, it’s not the easiest to use out of the box, but it is by far the cheapest at around $60 or so. The N1201SA will cost almost double that, but it is by far the easiest to use out of the bunch and is highly portable (although the NanoVNA v2 with a battery is as well - just a pain to read with the smaller screen IMHO). I wouldn’t look at the original iterations on the NanoVNA at this point - for a few bucks more, you get a much better device going with the V2.
All give very similar results in the end. if you want to save some cash and don’t mind sitting down awhile to learn the in’s and out’s of something, the NanoVNA v2 may be your bet. If you want simplicity as well as decent accuracy, the N1201SA works great.
Here is a little more info, maybe it will help: Low(er) end VNA comparison