He says that Bruce is a trained singer, not like him or Blaze and for him, the rock 'n' roll singer should sing from his heart.
He gave Blaze a 7 and Kiske 2 (Bruce Dickinson wannabe were his exact words and he even do not know who is this singer, or he lies). But hey, he gave Rob Halford a 9 which gets my praise, but no way James is on Halford's level or better than Bruce - Bruce deserves a 11 form this scale of 0-10.
His other grades are:
Dave Lee Roth a 4
Axl Rose a 0
Vince Niel a 00
Bon Jovi a 000
The thing is, and Paul knows this, Bruce is minus 11 compared to peak Paul.