This is a good example of iZotope T-Pain Effect v1.02 standing out from the crowd, because iZotope T-Pain Effect v1.02 does more frequent AutoTune warble / wobble and flutter effects on 'certain parts of vocal recordings', but those same 'certain parts of vocal recordings' sound more normal / straight-line on all of the other AutoTune VST's. Here's a comparison of all the main AutoTune VST's on the same vocal recording, the key & scale is set to C Major and the AutoTune speed is set to max on all of the AutoTune VST's. I also figured how to replicate Slate Digital MetaTune's (negative -3ms speed mode) with the iZotope T-Pain Effect v1.02 VST, you basically just open up multiple instances of the iZotope T-Pain Effect v1.02 VST and set all of the multiple instances of the iZotope T-Pain Effect v1.02 VST to C Major.
I always had suspicions that Slate Digital MetaTune (negative -3ms speed mode) was overrated, and it's not really negative -3ms speed AutoTune, it's just some lame glitchy effect that sounds nothing like the AutoTune effect.
iZotope T-Pain Effect v1.02 does more frequent AutoTune warble / wobble on 'certain parts of vocal recordings' than Slate Digital MetaTune set to (negative -3ms speed mode)