Is the person in this photo Lawrence Ashton?

A few months ago, I purchased a picture below off ebay:

The picture is of a WW1 soldier and the uniform indicates that he was in the 75th Battalion CEF. My thoughts (and main reason for purchasing the photo) were that this could possibly be my great-grandfather, Lawrence Ashton, who was in the 75th Battalion CEF. I have included some pictures below that are of him for comparison. Any thoughts as to whether he might be the same person as the one in the ebay photo? I've asked a few people and have received different opinions.