i have both a 400ex and a blaster. while the fun factor of the blaster takes the cake, its still no match for the 400ex in any way. the 400 has TONS more power, a cadallac like ride, and gobs of low end grunt. it beats the blaster in any type of race i wanna put them in. plus the size difference makes it much more convienant for riding a passenger or tearing up teh trails. its wider so its less tipsy and turns just as well in a tight situation. i can jump higher and further on the 400 in any gear vs the blaster. i can climb big hills with the RPM in normal operating range and not have to worry about being in a gear too high.
My blaster has just about every bolt on mod i can put on without the 240 kit. even if i had the 240 kit on it, i still wouldnt like it over my 400.
the only thing the blaster has is its spunk and fun factor that comes along with a 2-stroke. when im on the short tight areas i prefer the blaster for its compact size and instant RPM.
this is why i have the 2 most popular ATV's out there. when one isnt doign it for me, i get on the other and have fun.