From here

I wonder how many Hasbro versions of MPs are better or on par with their Takara (TOMY) counterparts. Not including special imports and excluding MPs for which there are no counterparts.

  • MP1 Convoy = Takara

  • MP3 Starscream = Hasbro

  • MP6 Skywarp = On par. Takara's better for show likeness and Hasbro's is better for toy accuracy. Judging from photos though, I've never seen the Hasbro version IRL

  • MP8 Grimlock = On par. Takara's better for show likeness and Hasbro's for comic likeness. Both toys can become toy-accurate thanks to changeable eyes in both modes.

  • MP-9 Rodimus Convoy = On par. Takara's better for show likeness and has much more effort put into the deco, but has some design flaws. Hasbro's is more toy-accurate ('cept the hands) and fixes some of the design flaws but has a lazy deco. Takara's has the trailer while Hasbro doesn't, but Takara's is also significantly more expensive.

  • MP-10 Convoy = TakaraTOMY. Although the Hasbro one is cheaper.

  • MP-11 Starscream = On par. TakaraTOMY's has a more show-like grey nosecone and coronation kit, but Hasbro's has a toy-accurate blue nosecone (albeit it's cartoon-accurate light blue not toy accurate navy blue) and additional accessories not included with the TakTOM version. Again, based on photos as I've never seen either TakTOM's or Hasbro's IRL

  • MP-11S Sunstorm = TakaraTOMY. Was Hasbro's cheaper? TakTOM's was 13650JPY (approx. $170). Either way, Hasbro's looked cheap. Judging from photos as I've never seen Hasbro's IRL outside of its box.

  • MP-11T Thundercracker = On par.

  • MP-13/15/16 Soundwave & Cassettes = On par. Hasbro's Soundwave is more toy accurate while TakTOM's is show-like. Hasbro's Frumble have sacrificed chrome for metallic paint colours. Hasbro's is cheaper though. Hasbro's Frenzy is technically incorrect because he's purple like G1 cartoon Rumble (but not like G1 toy Frenzy who's two shades of blue, not purple; Hasbro really should've switched Frenzy and Rumble's names and I'm assuming that every Anglophone fan is going to repurpose them as FIRRIB anyway)

  • MP-17 Prowl = On par

  • MP-18 Streak = On par

  • MP-21 Bumble = On par, based on photos of Hasbro's; no significant differences