Agree with redpoodles’ response above. It should really come down to money. The schools are very, very close to each other in terms of character/vibe. Colgate is probably a bit more of a party, greek-driven scene with Div 1 athletics, while Middlebury perhaps a bit more serious in terms of academics, and a classic NESCAC school with no greek system. They’re both excellent schools, so hope the finances work out for you at one or both.