i wear two dive watches from Certina, a Mido sister company - the DS diver and the PH500m. Same ETA movement as the Mido you’re considering. I also wear a Squale 2002, elabore grade ETA 2824-2 that’s normally a few seconds more accurate per day than the Certina watches. All worn frequently, all have been in the water, on hikes, long bike rides, and so on. None of them have any issues or problems. Setting aside that there may be occasional lemons in any batch of manufactured products, I’m confident both of the watches you are looking at are high quality.
Given your size range, it might be worth looking at the Longines Hydroconquest 41. With any discount at all, it should be in your price range. A different look with the Arabic numerals; a much-improved/simplified dial from previous models, in my opinion; and a movement that’s arguably an upgrade from the watches you’re considering. Overall, an extremely appealing dive watch. Another option, though perhaps a tad larger than you want, is the Mido Ocean Star 600. Chronometer-grade movement at that price point is unusual.
I think you should choose the one that you like better and could see yourself wearing.