well, one could always do an "equo install ati-drivers" (along with my quick-n-dirty help directions) and see if it works
if it doesn't, "equo remove ati-drivers" and visit the master repo, snag the older blob and install it.
All of the ati-drivers get "tweaked" just a bit to match the current kernel/xorg combo. There's a lag time for either nvidia or ati drivers, but the differences are normally minor validation checks if anything. What's listed in the AMD page is what they performed full regression testing on. the kernel and xorg APIs don't usually suffer massive API changes in minor revisions that render the drivers completely incompatible. So far, that's been my 15+/- years of experience.
Of course, nvidia drove me away with the "blue people" in adobe flash, although simple to fix, friends drove me nuts every time they upgraded their systems
, along with the 50% cut in power consumption on the 7xxx series of ati cards. Wasn't a difficult decision when Linux himself told "nvidia" they were number one, using his middle finger
I'd give it a try, there's not more than 20 minutes to lose in a good attempt
Cheers and good luck!