Sorry it took me so long to reply.
To my eye, the EX35 does have more ground clearance than a G35. So, yes, I believe you will sit at least 3-4 inches taller in the EX35.
In person, the EX35 seems "just right" in size. At least, for me. Exterior wise, it seems to be just a touch bigger than the Nissan Rogue. Unfortunately, due to the EX35's rear-wheel drive (with more engine compartment space required), I believe the EX35 will actually have a bit less interior room than a Rogue. At least one review I've read (can't remember where) mentioned that rear-passenger leg room was a bit cramped on the EX35.
Sadly, that might be a deal breaker for us. I won't know until I sit in an EX35, adjust the front seats to where we need them, and then try out the rear seats.