"To mark the difference" means to highlight or indicate the distinction or contrast between two things, showing clearly how they are different from each other in a noticeable way. Full definition
Previous research from other studies had linked hearing loss with marked differences in brain structure compared to those with normal hearing, both in humans and animals. (sciencedaily.com)
To test quite how marked the difference between the modes is, we tried a few benchmarks. (trustedreviews.com)
At the same time Variable Life policies have marked differences from other permanent plans which deserve your attention. (allinsuranceinfo.org)