lets brake it down
Starter box:
PROS::no need for OWB, less drag. Lighter too with no pullstart. Its easy, just plug it in and you good to go (with a 12v cell), bump and go, car stand- car can run on it. Can put stickers on it[&:] looks cool.
CONS::Big, heavy, and can be somewhat expensive.
roto-type starter:
PROS::light, cheap...
CONS:: uses OWB, will slip, more drag and weight, no car stand, you look like a moron (at the track) NO STICKER OPPORTUNITIES
[:@]
the only time rotostarters are acceptable IMO are in bashers' savages.