I just got my BB72 yesterday, so I have yet to use it, BUT from the manuals alone, I'd say go with the SQ. Bird (TBN member) had to link me to the Squealer's manual (
here ) just so I could figure out how to check the PTO shaft length! The BB manual said nothing about this. Most experienced "farmers" might know this trivial bit of info, but I find it a gross oversight on their part (and have already given them heck about it)...
ANYWAY, the mowers seem to be very similar, right down to the deck design. Comparing the specs (I have the BB manual right here):
BB72 wins in weight (702lbs to 650), standard slipclutch, and a wider tractor HP range.
SQ72 wins in cutting height (12.5" compared to 9"), overall length (it's shorter by 8") and operator manual thoroughness. /forums/images/graemlins/wink.gif
Both seem to be equal in cutting capacity (1"), deck thickness (10 guage) and blade tip speed. Now, how the prices compare, I don't know. I can tell you I paid $1150 for the BB72, which included delivery and assembly. No options, like chain guards, etc though.
I hope this helps.
- Gerald