Hi Ranch,
So you have 2 offers from 2 universities; one 40mins away, one 2 hours away. And you don't know which one to choose. Is that right?
Seriously, there are other things to consider. Which one has more funding? Which one is a a better university, supervisor, department, project etc ? Those are the some of the things I would consider before travel distance. A PhD is 3 years so making sure the PhD itself is best for you should be your priority. Also the interview doesn't matter now if you have offers from both of them. Hope this helps.