Maybe this can help. I do not have an MP-01 or an MP-04 what I got is the Hasbro version but this article from the AllSpark forum courtesy of powered convoy can shed a light into it.
" plan on doing a full gallery with detailed pictures at
www.cosmicrust.com in the near future, but I figured I'd let people know of the differences I've spotted in this figure from the original version.
First off, is obviously the trailer. I must admit it's nicer than I thought in most ways. The gray plastic is very nice, as is the stripe detailing. All of the little details inside and out are great. The trailer stand, the opening doors and ramp, the classic supports with extending support, and storage for the weapons are all great touchs. The lack of a Roller, and the simplicity of the command deck module are a little disappointing though.
The Convoy's photon rifle is still gray for those of you who wanted to know.
Now for the differences of the actual Convoy figure.
-First off, he seems to be a shade (just a bit) darker red than the original. But we do see this from time to time with figures of the same run, so I'd just chalk it up to batch differences.
-The Energon Axe. Is very clear in the center, as oppossed to the more orange original and even more orange US version.
-The windows. Are a lot more blue. This is not just a variation in plastic, as the difference in red can be explained by. Takara clearly used a different color, and it's much more blue. But still not as blue as the promotional pictures. Though a nice touch.
-The matrix. This is probably chalked up to the different shade present on the windows. The matrix now lights up blue, instead of just white. The chrome is just the same (not like Magnus'). Not sure if the light is different (haven't explored it enough), but it definetly lights up blue (and the matrix's plastic is more blue) as oppossed to white.
-His communication stickers. Now I found this to be the most exciting part, and I'll let the stickers speak for themselves (by the way the original had Bumblebee on the left arm and Starscream on the right, Magnus had Optimus/Convoy and a tech read out of some sort)
(IMG:http://i6.photobucket.com/albums/y215/PoweredConvoy/DSC04005.jpg)
(IMG:http://i6.photobucket.com/albums/y215/PoweredConvoy/DSC04004.jpg)
Though pricey, these little differences (blue windows, new stickers, blue light in matrix) make the money I spent on this version seem a little more worthwhile.
Randy
Edit: One more thing. The only thing I figured this figure would have different than the original is that his face plate sat higher on his face, which it does. MP-02 Magnus was the same way, so I figured MP-04 would be too. And thankfully I was correct as it looks better (to me at least)."