There are so many different types of hardtail and full susser and many different trails of varying severity. Riders also have different skill levels. There are trails that I can ride on both an old skool geometry XC hardtail that are boring but much faster on my full sus. And there are trails that are simply to steep and severe (for me) that the only way I can ride them is on my full sus. There are also trails on which the full sus is slow heavy and lumbering but where the the 90's XC hardtail kicks ass.
If you're racing ride the bike you think will be the fastest on that coarse. If you're not ride the bike you think you will have the most fun on. Simple!!!
totally agree, but you dont "need" full suspension, you ride to the bikes limits, not your own. tbh rampage is ace and very very special, but jumping dowes not require suspension at all, but it does soften the landings
which does help immensely, ive ridden peatys stomping ground a great number of times on both types of bikes and sure f/s was great, but it doesnt help while flying
i would quite happily ride against anyone on my long travel hardtail on any terrain, not to prove a point, just because i can lol