https://www.youtube.com/watch?v=dKt6l1Y1wr8
While mine arrives (Only just started shipping alongside mp artfire) been trying to understand this cross comparison since he's had both (he modified his hasbro release because of the gap issues).
All that I understood about the differences are
-More "complete" deco in robot mode (yellow spots on abs, blue rings on feet, and a TINY autobot tampo in the middle of the abs)
-Light grey plastic instead of the dark grey previously used which helps certain sections like the gastanks blend in better
-Box text differs such as name bar in Japanese and botton of box features Japanese warning box much like normal mp's and mpm03
-Manual differs (?) much like mpm03
-Something about the tray??? (kinda looks like he comes in truck mode and its in a proper clamshell but I've only seen prime standing upright in the english/asia version so no idea if this was a change or exactly the same but he pointed it out briefly)
Can't tell if the tabbing is any better or worse but he does point out a misaligned section on the truck cab, overall I cannot wait for mine to come!
EDIT:https://www.youtube.com/watch?v=76virLhQ5do
Another youtuber pulling him straight out of the BOX IN TRUCK MODE...but it features similar miss-tabbing, I presume they all have similar issues to the hasbro version out of the box or that's transport shuffling.
Only way to know is to transform him to robot and back it seems