I have the version with the adjustable sights (which I was willing to spend the little extra for not only for the site, but because the front and back straps of the frame are checkered rather than serrated). My local gun shop still has the fixed sight version in stock, right next to a fixed sight CZ 75B. They have the AR-24 selling for slightly less. I understand this may not be true everywhere, and I have seen the AR marked slightly higher on some internet sights. Nonetheless, the difference usually seems to be under $50 either way, so price needn't be the dominant consideration.
Personally, I'd suggest handling both of them, and if possible, shooting them (if the range has rentals of both, or you know people who have both), and make your decision based on which you personally like best. Quality-wise, there seems no great difference between the two. My AR-24 is a very well made gun, shoots very accurately, and so far has fed every 9mm load I've shot through it with no difficulties. I personally like it better than the CZ. I think it looks better, and I find the grip, with its greater indentation on the backstrap, and the palm swells on the grip panels, simply fits my hand better. I can recommend it without reservation.