What's this art style?
Some sources found:
(More pertaining to the first image)
Don't think their is a definite term per se, but here is some info:
Term 1: &quot;Illustration on photo/photograph&quot;
When searching Google with these terms, came across the original artist related to image 1:
Source: https://www.behance.net/gallery/53008399/Vector-covered-souls
The tools used were Adobe Illustrator Draw.
Term 2: Vector drawing over photo/photograph.&quot;
From the artists portfolio they seem to have a series of vector images drawn over top of portraits of human faces. So this might be helpful.
Other terms Googled terms to look into: &quot;Cartoon drawing over photography&quot;