User blog comment:Xilinoc/Ch. 550 - Blazing Bullets/@comment-1268838-20130925161250/@comment-5028409-20130925192637

Yama could PROBABLY obliterate 3 captain level opponents with the North Bankai ability.

On topic, like Mohrpheussaid, Bazz-B's flames only managed to offset Shikai yama flames and still got roasted. That should be proof enough that Bazz-B's flames are indeed weaker than Yama's.

Grimmjow did this before in the fight against Shinji, whereby he reduced the damage of Shinji's cero by firing his own. But he still got wounded pretty badly. This doesn't mean that Grimmjow's cero was equal in power to Shinji's.