Today I saw a Dungeon Fantasy Roleplaying Game question (or rather, question spanning both GURPS and DFRPG), and decided to add the latter tag to it, started typing dungeon-fantasy-roleplaying..., didn't see an autocomplete, realised it's too long, added dfrpg instead because that's how the community seems to usually refer to it anyway, added a wiki explaining what it is and pointing out that it differs from GURPS Dungeon Fantasy (and had it approved).
Then I noticed that there have been other DFRPG questions, with a confusing tag gurps-dungeon-fantasy-rpg. And now that I know it exists, I think it should be replaced, but was unsure whether to just do it, or bring it up on meta. I asked for advice and was directed here.
Why It's a Misleading Tag:
TL;DR: it mashes together two titles - GURPS Dungeon Fantasy and the Dungeon Fantasy Roleplaying Game, which are already easy to confuse.
The original GURPS Dungeon Fantasy line is a series of products meant to be used together with GURPS 4th Edition, requiring the Basic Set and strongly suggesting having Magic. Functionally it's an expansion, a series of supplements.
The Dungeon Fantasy Roleplaying Game is a standalone boxed set (also available in PDF) that is fully self-contained, and whose rules differ from the main-line GURPS rule-set (e.g. slams) and have been otherwise streamlined. Officially that is termed Powered by GURPS.
While there is a large level of compatibility between main-line GURPS and DFRPG, it's still considered 'unsafe' to just assume that a mechanic is the same between the two. In fact, on the official forum, DFRPG resides on a separate subforum (not a subset of the GURPS subforum).
(Note: so far only two questions are using the old tag, though there may be more DFRPG questions around already - I only made a quick search. This is why I considered just doing the replacement without bringing it up.)
Given the above reasoning for keeping the distinction clear, I would like to completely replace the older tag (gurps-dungeon-fantasy-rpg), and/or leave a wiki warning elaborating that the two are similar but distinct, and asking to use either of the appropriate tags. Should I just do it, or should I not (and why), or is there an alternative procedures that should be followed?