I think you answered your own question. A 2% imperfection in IV is negligible, especially when the imperfection is in the HP stat of a mon that already has unusually high HP like Wiggly. So move set rules! I've got a similar dazzling version and thought it might at least be decent for gym levelling, but is rather underwhelming. My 1600CP Wiggly with Pound/Play rough is rather good at leveling against high CP dragonite though.
GamePress
What to do with this 100% Wigglytuff?
I started out with a 98% Pound/PlayRough that I've powered and use a lot. (15/15/14 lvl 27.5 with what looks like 2 powerups left for my current trainer lvl)
A few weeks ago I evolved this 100% Wiggly with Pound/DazzlingGleam.(lvl20)
Haven't powered it yet.
Ignoring my low dust, should I focus on the 98% Pound/Playrough and keep 100% Dazzling at its current CP until I figure out what to do with it?
I have read a lot that Pound/Play Rough Wiggly is all around better than Dazzling.
I'm thinking the 2% IV difference is negligible.