The Trek does have nicer components. That may not necessarily translate into a longer interval between tune ups.

Do you have any preference at all? Is one more comfortable than the other? Do you like the paint better on one? Did one shop treat you better than the other? Is one shop easier to travel to than the other?

It sounds like you should ask at least one shop to retune the bike you're interested in, and take another test ride. Don't buy the bike if it's not shifting and performing well during the test ride. But know that some shops don't bother to tune a bike before each test ride. So if you test, and something seems amiss, don't be afraid to speak up and see whether the shop can address the problem. Or, it could be that you are perceiving the difference in component quality.