My daughter is tall for her age (40 inches and not yet 3) and has a long torso. She requires at least the mini gt because it has extra head space between the seat bottom and the canopy. We have the city elite at home because the weight limit is even higher and we figured kiddo's only going to get bigger!
That being said, plenty of people here seem to have the city mini work just fine for them so I think you'll get a number of responses that the mini is not a problem even for a taller child.
Best of luck. Hope you have a wonderful trip!!