The tires will make more difference than the weight. Any decent hybrid will
be much lighter than the crusher. All major bike companies have aluminum
frame hybrids. Most don't get weights.
Tire size, gear selection, crank arm lengths, fit, all have a bearing on the
speed, as well as your fitness level.

I would recommend going with 36 spoke wheels, the small weight savings
are not worth the difference in strength.

I ride an old, '91, Trek Multi Track, plenty of speed and a velvet ride.

Point, don't get hung up on the weight weenie track. The right fit,
and right tires, make all the difference.