What's the difference between the GR07 bass edition vs GR07 MK2? You mentioned in a previous comment that one of these share 95% similarities with the Phonak audeo PFE232 which I can't afford. But I can afford the gr07! What would you recommend me? I want to try the sound signature of the PFE232 but at a more affordable price.
The difference is (surprise surprise) bass quantity but the bass has some additional effects - it makes the midrange of Bass Edition sound more recessed in comparison to that of the regular GR07, for example. See paragraphs 4-5 here for more info. The Bass Edition has a little more mid-bass punch than a PFE232 with my preferred (gray) filters. The GR07 has a little less bass overall. IMO it's more about how much bass you want instead of which matches the 232 better, because they are both pretty close.
Well, it's not without issues but if you get past the sound signature if performs on-par with a lot of good earphones. In A:B comparisons it really did make the RE-400 sound pretty bad, and vice versa. It was a hard call to say which is "better" overall because they are so different, and I am sure there are many who will love the sound of the T-Peos .
I don't think the T-400 fits on any of those except the Quadbeat and RE-400. VSonics have a tricky nozzle, they take a T-200 but it's a little loose for my liking. The MH1C seems be somewhere between a T-200 and T-100. The T-200 is definitely too loose on it.