The Milton line options is only better if you're not going the full length of that line and want to get to Milton or Mississauga. If people are going to Toronto, then this route is better because it's a few minutes quicker with the possibility of a lot quicker as more work on the Kitchener line gets done, and it also gets you to Guelph, where probably a lot more Cambridgites actually work than Toronto or Mississauga (based on common commuting patterns).
I'd be willing to bet that $500M on this spur line gets you a far bigger ROI from Guelph-Cambridge economic benefits than spending billions to extend the Milton line to Galt.
Of course, I think we should have both Guelph and Milton, and the Lakeshore West Hamilton→Brantford extension that takes back the Paris rail trail and loops up to Cambridge.
I'd be willing to bet that $500M on this spur line gets you a far bigger ROI from Guelph-Cambridge economic benefits than spending billions to extend the Milton line to Galt.
Of course, I think we should have both Guelph and Milton, and the Lakeshore West Hamilton→Brantford extension that takes back the Paris rail trail and loops up to Cambridge.