My review is specifically comparing the Space One vs Space One Pro. I am posting the same review on both.Short version: I returned the Space One Pro and I am keeping the Space One.Space One Pro advantages:+ folds (slightly) smaller. The difference in folded size between the two was much less than I expected. See photo for a comparison of folded sizes.+ better seal around earcups resulting in mildly but noticeably better noise canceling. ANC itself seems similar on both, maybe somewhat better on the pro’s but it seems like much of the improvement actually comes from the tighter earcup seal and not ANC.Space One Advantages:+ Feel sturdier+ Higher quality carrying bag+ Holds onto my head better, the Pro’s would slide off the back of my head anytime I was laying down, even when mostly still (ie while benching at the gym)+ Half the price+ Has Auto Play / Pause when removing from your head (I was surprised to discover that the Pro’s are not equipped with this!)Unfortunately I recently had my AirPods Max stolen, I had them for years and LOVED them. I’m not currently in the financial position to replace those so in the meantime after some research I settled on buying some Anker headphones. I ordered both during prime day, with the intention to test each and pick one. I was expecting to be debating if doubling the price was justified for the Pro’s, but I was surprised to find that in a few key areas I actually prefer the regular space one.Let’s start with audio quality: both are good but not amazing. They both have a lot of bass, if you’ve ever used old beats headphones they’re similar to that. Which for my needs is good. I actually think the non-pro’s have somewhat better sound, it just seems clearer and more detailed. The pro’s are excessively bass heavy, to the point of sounding muddy and annoying. And I’m usually a “bass boost” EQ type of guy but not on those, on the pro’s I found “treble boost” to be the best as it helped make the bass “cleaner”.As far as ANC, these are no AirPods Max, but I expected that. They’re both decent, they’re good at canceling airplane noise which is the main thing I need ANC for. I had a pair of flagship Sony’s 5-6 years ago and they’re about equivalent to that, although the Sony’s would always give me a headache from the ANC after a while and I haven’t noticed that on these. The pros do seem to block out more noise but it’s not a double the price difference.Fit & finish is, well, cheap AF on both. Honestly, at either of these price points, and ESPECIALLY for the pros, the public-library-headphones quality isn’t ideal. It’s all cheap feeling plastic and sticky sweaty pleather. They could’ve at least tried a little harder to make the fake metal look more metal-like. This cheap feeling is exaggerated on the pro’s because of the folding mechanism, since the earcups can swing around freely in so many directions it just adds to the flimsy feeling. At the $200 price point of the pro’s there really should be some metal involved somewhere. Anker take note: I would happily pay $10-$15 more for these exact same headphones made with some sturdy metal parts, a much higher quality appearance and some nice AirPods Max style fabric earcups.Both are comfortable, I found the pro’s to get sweaty faster around the earcups, I’m thinking this is because they seem to seal a bit better. My main problem with the pro’s was how loosely they hold onto your head, I think it must be related to the folding mechanism but I found them annoyingly and frequently sliding off at the gym. The non-pros are better but still not all that great, I wouldn’t take either headphones running but for my needs (strength training, around the office, while traveling) they’re good enough. Of course they’re nowhere near the comfort of my old AirPods Max but I suppose anyone reading this review isn’t in AirPods Max budget like myself, but if you are, go buy those.Other things: the pro’s do not have a sensor to detect if you have removed them from your ears. The non-pro’s do have this and they stop and start playing reasonably well in my experience. They both come with a little carrying bag, the non-pro’s bag is made from a quality feeling canvas type fabric while the pro’s come with a cheaper feeling pleather bag. Battery life and charging speed on both is excellent to the point that it’s not even worth comparing, I was always surprised that they still had so much charge left. Overall I think the Space One non-pro is a great value, especially at the prime day price I paid. The pro’s baffled me as in many ways they’re worse, and actually even if these were both exactly the same price the poor fit and lack of wear detection sensor would still push me to go with the non-pros.