I have both Tiger & Bunny SHF figures (when's the Bunny proto suit coming out
), & I understand what you're saying. Seems to be some weight in the armoured Tiger & Bunny figures (die cast somewhere?) & the paint app is really nice.
With the DBZ figures, there are parts where I'd like paint app to be a bit better. Like the orangy faced SS3 Goku (even if it's meant to be like that), & the shading on the white part of the armour of the scouter Vegeta figure (too much blue shading in there I think), there might be others, but I only have the Vegeta's & Goku's.
Having said that, if I could only collect one SHF line, it won't be as easy as picking which line had better quality for me