Swappable heads would be my first preference (let the collector decide), but Thick Ironhide, thin Ratchet would be my second choice.
Thin helmets for both
Thick helmets for both
Thin for Ratchet, thick for Ironhide
Thick for Ratchet, thin for Ironhide
Other (please specify)
Swappable heads would be my first preference (let the collector decide), but Thick Ironhide, thin Ratchet would be my second choice.
Even though the animated consistency of the cartoon is all over the place, the character models of Ironhide and Ratchet are less identical than people might think. The main difference is that Ratchet is curvier than Ironhide, and as such motorcycle-helmet-Ratchet and Spartan-helmet-Ironhide make the most sense. (For their characters too.)
Note that it was probably hard for the animators to work out what the hell was going on with the characters' chins if they were given the above linework to work from, hence even more potential inconsistency than usual.