Learn English – How to express “accommodatable”

In practice, they're usually the same.

The "might be able to" is a bit more formal -- perhaps because it implies more hesitation on the part of the asker if this is an appropriate time and place and topic for the question. The "if you could" might be read to imply that you doubt the ability of the person being questioned to help you.

Ambitious describes an eagerness to succeed and also implies that success has not yet been attained.