Seems on uespwiki are the same thing but on other references I read auriel is an elven ancient hero ascended to Godhood , whilemon others is Anu a primeval force ....so how are set the things?

The UESP is wrong.
From information of the DLC it seems like Auri-El is a god-ancestor similar to Trinimac or Phynaster.
He left for (ascended to) Aetherius, which is why he is revered among many elven people.
Anu is a primordial force, a few gradients of creation above Auri-El.

He does?
I dont remember that.
I remember him talking about other gods revered by the Snow Elves, and among them were many god-ancestors such as Phynaster and Syrabane.
In any case, he cant be Akatosh. Akatosh is still here, he is an Aedra, he is dead.
If he was an original god he is a Magna-Ge, and if he was born an Aldmer but achieved divinity similar to Trinimac then he is a god-ancestor.

All elves were once gods. In the Dawn Era, the subgradient chain was a lot shorter than it is now, and continuity of the universe was incomprehensible. It's not entirely impossible for the elves to have conceived the God of Time (not Imperial Akatosh, the original, unified spirit), as one of their own. The only odd part is that he is remembered for ascending, rather descending (in Adamantia). Maybe that's just the religious part of it. The Imperials also believe that their Divines live transcendentally in Aetherius, after all.