Back end and total hook are not the same thing also depending on bowlers stats. and lane condition. Steven you are confusing total hook to back end hook. Look at the total hook and back end plus torque numbers that's how you can compare ball to ballon BTM apples to apples. I see BTM numbers as very close to what I have seen.
Scott, I'm basing my conclusions on hundreds of games thrown across the balls I referenced. I understand the difference between backend hook and midland hook. In any case I was talking about total hook, meaning total boards covered.
Even at a higher grit, my personal experience is that the Primal Rage is basically a more aggressive ball than the Sigma Hybrid. I've never found the Sigma Hybrid able to handle the oil volumes that were advertised. I've seen this across many different THS and Sport conditions. Maybe different styles will see different results, but I'm pretty confident on my assessment.
As far as the Solid Ascent vs. the Thrash, this one should be a no-brainer. BTM's ratings fly in the face of Motiv's own advertised strength ratings. Motiv says the Ascent Solid is a light oil ball, while the Thrash is designed for medium conditions. So how does BTM give the Ascent a higher hook rating than the Thrash? My personal experience says Motiv's ratings are correct and the reactions aren't even close. I have sanctioned 300's with both, and I use the balls on completely different conditions.
I'm not making a blanket assessment of BTM's ratings, but I found two instances where personal experience clearly trumps BTM's ratings. I understand that different bowlers see different things, but sometimes real world differences between respective ball strengths is hard to dispute.
