Board Thread:Online Discussion/@comment-92.13.119.105-20131221193540/@comment-13446185-20131222030537

They have more of a human appearance, and according to these quotes...

"Indeed, the Nords found it difficult to distinguish between Elf and Breton, the two races had already intermingled to such a degree."

-Frontier, Conquest

"The Bretons, in ten generations of Elven intermingling and slavery, had become scarcely recognizable as humans. Indeed, the hunting party attacked them thinking they were some new strain of Aldmeri, halting their slaughter only when one of the oldest began to wail for his life,"

-Pocket Guide to the Empire, First Edition: High Rock

...The Manmer used to heavily resemble elves, obviously they have become more human since then, so it can be concluded that they are now more human than elf.