Haven't had a chance to compare back to back a 426 against my "04" model 450. I own a 04 model 450 and my mate owns a 426 01 model. He seems convinced his 426 will be quicker. I have read that Yamaha has said the 4 speed 450 has the same top speed as the 426 5 speed. Can anyone confirm this? Which of the two bikes is more aggressive in power delivery? Which would win in a head to head drag?