Ill cover the V35s. Sedans came out first in 2001 with 250GT (4AT VQ25DD 158kw), 300GT (5AT VQ30DD 191kw) and 350GT (5AT/8CVT VQ35DE same as 350Z) a 6MT was added in 2003 to the sedan with the launch of the V35 coupe which also had the same 5AT as 300GT
Early 350GT sedans had an option for a 8 "speed" CVT transmission. Opinion is varied but i would avoid if possible. Fluid changes are not cheap, it can only take a special fluid by nissan and because the car is getting on in age the fluid is getting harder to come by and quite expensive. The 5AT with a shift kit like alex mentioned is a better option or a 6MT.
The V35 coupe has the same running gear, suspension as 350Z (350z exhaust is shorter than the V35 coupe but otherwise the same, sedans are the same as coupe upto the axle back) only the Z is 100kg lighter and is stiffer.
Open diffs and average brakes came standard on all models. Early V35 premium manual coupes and track 350Z manuals had a VLSD diff and factory brembos which are interchangable on all V35s. Brembos got discontinued during the series two introduction.
V35s picked up the same update as the M35 stageas like alex mentioned with refreahed styling inside and out and equipment changes.
Factory tick options include aero parts, rays forged wheels, a sort of "bi-modal" exhaust, radar cruise, sunroof, carphone, T-junction camera (cameras in the side of the bumper so you can see whats coming if the view is obstructe- very cool) momo steering wheel and the usual matts, plastic etc etc
Depending on the build, model and transmission a sedan can fetch 7-18k and a coupe 14-25k.