I got this.
There was the first release:
This was the '94 Godzilla. He came with an atomic breath accessory, and a stand for it to balance on. I still really like this guy a lot.
Burning Godzilla:
This is from the '95 movie "Godzilla vs Destoroyah"…shares a lot in common with the first release, but he's a little stockier. He does have more poseability I believe, and he comes with a pair of alternate hands if I'm not mistaken. He doesn't have an atomic breath (only the first release does), but you can get his atomic breath if you buy Fire Rodan.
Additionally, there's a San Diego Comic Con variant where it's all translucent orange.
Classic Godzilla:
This is the only '60s Godzilla they've made so far. He's smaller than the others, but he's very articulate and really looks great.
Millennium Godzilla:
This guy's a beast. Very cool looking, this was the first one I bought for myself (the roommate has his own Godzilla figures, so I get to mess with his as well).
There are also two coming out this year - a '95 Godzilla (basically the Burning Godzilla, only with a regular, non-burning paint scheme…basically the same design as the first release but a different sculpt and better poseability) and the new Legendary Godzilla.
…SO! To answer your question, yes…any of the MonsterArts Godzilla figures are very well done and you'll like them.
And, since I wrote all this out, you can feel free to check out my animation I made with these figures
If you're a Godzilla fan, you'll like it. It shows the Original Release, the Classic, and the Millennium Godzilla figures' capabilities (as well as SpaceGodzilla).