Varying the bass as well as the bow makes it hard to
judge, would be better to play them on your own bass
and see what you think then. But at least keep the
bow as the only variable in the equation
There is also a significant difference in how two different
bows sound to YOU while playing, and how they sound
to a listener, so its nice if you can get a person to play
them for you as well as you playing them for yourself
The best sounding bow I've heard also happens to be
the lightest I've held (not my bow btw), but I dont know
that you can generalize.
And in spite of Ray's comment I feel that your
guess of what it comes down to is in fact the
case
Regards,