Godzilla 2014's odd dorsal spikes

I'm guessing the poster is showing a view slightly higher than the main back dorsal plates, possibly closer to Godzilla's neck.

There different angles of Godzilla that's why they look different, yes they look the same.

Part of it is that they are at different angles, but there's also truth to the fact that the poster is just a poster. Not all movie posters show official artwork down to the finest detail. When I analyzed the trailer where we get to see all of Godzilla's back under the lightning's light, I didn't see any of them curving upward like the one on top in the poster.

This, and the other official poster showing his tail, aren't 100% true to form as best I can see. They're damn close, for sure, but not exact. They're both meant to give you the best idea of what you're going to see in small pieces, and both do it quite well.

Even though it doesn't look exact to form, I still like them regardless. At least they look like the disfigured spines of Godzilla rather than iguana frills along his back.

and the trailer was like 2 years ago and the poster just came out