"Tall chassis" differences?

I'm shopping for an FM and I checked out a really clean nicely prepared car today but it's a "tall car", and I'm not that tall. What are the exact differences between this and the standard chassis? I know the roll hoop is taller but are there any other differences? Weight differences? Would it be unwise for a regular size person like me (5'10", 160lbs) to get a tall car? Other than the silly looks of a super-tall roll hoop protruding over my head...

I noticed that the bars connecting the roll hoop to the cockpit are positioned further forward than the regular setup, I'm worried that would interfere with my peripheral vision but I forgot to check that while I was there. doh! :mad: