The polished one has an S35VN blade, the G10 you're looking at has a CTS-XHP blade.
The S35VN is probably considered to be a better steel than the CTS-XHP so that's a consideration. Is it enough better to warrant the cost difference? I don't know--my gut feel is that most folks would not be able to tell any difference in performance.
That said, I think that the handle makes a bigger difference than the blade steel in this case.
G10 provides a really grippy surface. That's really nice in a working knife. Unfortunately, it is also very hard on clothing and will wear holes in denim pretty quickly.
If you're going to actually carry it then the polished version won't tear up your clothes as badly.