It’s tough to disentangle the specs and prices without being an electrical engineer.
There exist some guides for us mortals as to what specs to think about. I consulted one or two a few years ago, google is your friend. Takes some patience.
The thing with tuners (and CD players) is that because there are moving parts and precision components, it may not be prudent to get one that is becoming tired, or you buy with the knowledge that it probably will need to be re-calibrated and so on - so it may be false economy and that might blunt the fun.
I saw this at the fmtunerinfo site reading (? struggling, actually) through the shootouts of vintage gear. Often they would say that a tuner being considered needs looking at for one reason or another. Yeah, they may have been state of the art at the time, but now they are quite tired.
Yeah, as always, the sweet spot is good - forget the elite and also the rubbish, leaving a good bunch in the middle. I use a yamaha, from the mid 80s. Its pretty good with great ability to pick up distant stations or weak reception, but sadly not analogue.