I tried Topaz, DXO Pure Raw and ON1 for try out period to compare. I found DXO to be marginally the best, Topaz similar but very slow and ON1 to be the fastest and close enough to the other two. So I ended up with ON1 2023for the following reasons. Mainly it was way cheaper and bought outright. I don't like subscriptions. I'll get an update when it suits me and there are significant improvements which isn't usually annually! I like to load up single files and not catalogues of everything on the card which it easily does. It has a simple save as interface and not an overly complex "export" mode. It also has lens profiles and an extensive number of tonal adjustments plus a few interesting AI and sky presets if you like that sort of thing. So it is a complete package. The noise removal amount is very user adjustable. When I tried Pure Raw there wasn't much in the way of lowering the amount an I hate over sharpened and over noise removal n shots, especially wildlife. I believe DXO may have rectified this in later versions and they do probably give slightly "cleaner" results. I do have an earlier version of Topaz AI which I try from time to time on certain images. I also believe that things are very much subjective and each user has their own preferences for workflow etc. so it may not suit everybody but for me it was the best overall editing program. (I still have older PS elements and fairly recent Affinity but Camera Raw doesn't accept new files unless I convert to .DNG.