So you've found the accuracy to be pretty much on par for all these programs?
Every program hv it's plus points & negative points.
AJ bandpass is not interactive.
Bassbox pro shows different matching.
But if results from bass box pro fed to winspeakerz, then they r ok.
Winspeakerz gives u 9 different graphs. u select what u like.
Bassbox pro & winspeakerz r auto as well as interactive so that we can design the box as required by us.
Then we can crosscheck with other softwares.
In Subwoofer design tool box u need more experience to design bandpass box.
But the results r almost same within 2~3%.