First, as an aside, his name is TechAngel... Akatosh is his title on the forums. Common mistake (He is kind of Divine...), no worries, just though I'd point it out.
As to the question regarding SSE vs. LE, SSE has a number of improvements over LE, starting with the fact that it's a 64 bit application as opposed to LE's 32 bit... which means that the classic problem of having your game crash to desktop from lack of memory (a very common CTD issue) will essentially be gone. It also makes a number of engine changes, particularly where lighting and lighting effects are concerned.
On the other hand, SSE doesn't have nearly the mod library that LE does, though a bunch of LE mods can be converted over with relative ease. I'm about to make the jump to SSE myself because of those memory CTD drops I mentioned earlier - though I could live with them, turns out I can't.
Can't speak to PerMa working or not with SSE - though I imagine if it is, there will be a link to the SSE version on the Nexus page if it does.