Some good news, I had mesa-amber and lib32-mesa-amber installed. I installed mesa and lib32-mesa, rebooted and not only has my system stopped stuttering, but the Windows game that broke today in Lutris/WINE is working again.
Regarding my original question, the thing that prompted me to look into it is there’s a post here on the forum (a survey) asking for feedback on the different AMD graphics driver packages. [SURVEY] Linux Gaming guide - AMD Drivers The author of the topic lists 3: AMD RADV, AMD AMDVLK, and AMD AMDGPU PRO. This is also why I had tried installing mesa-amber.
Anyway, I’m still curious to know what I’ve got and how to switch (if needed). It seems AMD RADV is the most preferred among the voters in that forum thread, so I want to make sure I have that.