I haven't seen the actual model much, but considering the MK IV is earlier, I don't see why it wouldn't be easier. Although, there are more reference pics of the Mk V so that might be easier for detailing as well.
oddly enough after staring at both the halo 2 and halo 3 armours there are alot of subtle differences. and its not just the different poly counts and texture sizes. i wouldnt be supprised if the halo 3 armour turns out to be a mish mash of a mark 7 and a mark 6 if not just a whole mark 7.
Well, the Halo 2 and Halo 3 models and textures are a bit different. But they weren't going to use the same models and textures in Halo 3 as they did in Halo 2. That would be... Horrible. To say the least.
They just remodeled it, and added some minor details to make it look better and more realistic.
The MK I was essentially an armored exeskeleton, which never saw the frontlines. The MK II was the strongest, but it still had to be plugged in. The MK III improved on the power problem, but as it recieved power like the orbital MAC guns, it was still vulnerable. The MK IV. This is where it gets good. For those of you who have read the books, Dr. Halsey, the creator of the SPARTAN - II program, took control of the MJOLNIR program for this version. by the time this version was even designed, humanity had been at war with the Covenant for a while. The armor did feature many of the amenities of the V and VI, but lacked in areas, especially shielding.We're all familiar with the V and VI. Also, the armor version DID NOT change between Halo 2 and 3. As far as I know, there is no MK VII armor. Any questions, I'll answer them.