No, Arxiv only adds its own watermark on the left side of the first page.
Do note, though, that among the article's metadata on Arxiv there is a "journal ref" field where you can specify in which journal your preprint was published. Once you log into your account, next to your list of Arxiv articles you will see a "journal ref" icon.
This is the ...
The gray part is added by the publisher (IEEE) on the early access version of the manuscript, once accepted.
Note that you may not be allowed to submit such a version to arXiv, see this question and the accepted answer.