from personal experience...LT's = CEL and a nice gain

also opened the exhaust up even more for a bad ass sounding V6.
really depends on what you want. are you going for maximum gains by keeping it NA or do you just want to pep it up a bit?
a comparison of both is really done from looking at the claims made by the manufacturers with real numbers, shorties are almost always half the HP of LT's. BUT there are a handful of guys on here who started with shorties that can give you a real world comparison and hopefully some dyno numbers along with butt dyno affects.
either way you'll be happy.
good luck