I think we were reading different translations. In the one I read, he says he did it with a single finger or something like that.
Checking the other translations, the one you read might have been a speedscan, so I wouldn't trust it.
Other translations of the line say
BazzB: Your Captain-Commander's flames...were stopped in their tracks by the sheer power of mine!
Which makes it seem like Bazz's flames are supposedly stronger hence why they managed to survive (vs his flames being on par with Yamamoto's fire) but even then, I doubt it having seen what both were capable of during their final battles.
The one finger comment was always directed towards Hitsugaya, since Bazz was boasting that he could take down Hitsugaya with his Bankai with only Burner Finger 1.
Well, no. Even with that translation, it's not saying Bazz's strongest flames == Yamamoto's shikai flames. It says he has flames at least as strong as Yamamoto's.
Let's be real here.
We seen what Yamamoto did before he died.
We seen what Bazz did before he died.
We can be generous and say that Bazz's flames are slightly stronger than Yamamoto's shikai, but there is no way anything he did during the fight with Jugo could come close to Yama's "here's me using solar flames to armour myself and cut you down" Bankai.
Bazz's bragging was about him managing to survive being hit head on with Yamamoto's shikai and living to tell the tale with the others. Hence why he was so proud of his flames cancelling/nullifying his. Outside of that, he had never shown himself to be anywhere near Yamamoto's fire power at its height.