I own both a superlight (I think slightly lighter than a blur) and a bullit and here's my experiences with them:
if the trail involves a climb anywhere near 1500' or greater the bullit stays in the garage
for DH, urban, jumping off loading docks the bullit without question.
I can't bring myself to lug 37 odd #'s of bike up 2000' verticals for short little XC runs.
However, hucking off stairs or for the infrequent chair-lift ride, bullit please.
Also I have noticed that my superlight I can go pretty nuts with. It doesn't have the plush stable landing I feel with the bullit but it is not out of it's element even on a 6' loading dock near where I work (I regularly chuck my bikes off it even an old school zero suspension mtbike POS).
All I'm saying is you will probably prefer the lighter bike, and all the other nice'ities of the blur like the revised rear suspension compared to the heckler.
sorry I can't help with weights. my superlight has a 100mm SID up front and a fox RL out back, on commuter 1.95s it weighs about 24.5#, my bullit in DH trim (2.5/2.3 tires) weighs 37#'s with a 150mm Z1 up front and a 5th element steel spring.
I'm in decent shape but for some reason the Bullit is sitting in the garage more often than not on an XC ride. And I end up using the superlight for commuter duty too (even though it's mostly flat). enough rambling.
