Looks like splash to me. I don't know the line at all, being over here in Australia I don't really pay attention to lines in the USA.
Why I think splash:
- Blue eye - caused by frame or splash, not tobiano or sabino
- high leg white - not caused by frame, as frame likes the legs to stay dark
- nice neat edges - could be tobiano but clearly not in this case
- bald face - sabino usually leaves colour over the eyes if it can, frame can cause bald faces but probably not the cause in this case.
The head in particular has that splash look about him... the "I just dunked my big ol' head in a bucket of white paint!" look lol.