Not sure how much degree the B is, I can't remember whether I have ever read this anywhere. The initial Bitcoin logo wasn't this which was later even changed by Satoshi Nakamoto into the current logo of bitcointalk forum. Later on, bitcointalk user bitboy came with the current version though his thread doesn't show the image he posted. Check here- https://bitcointalk.org/index.php?topic=1631.0 though you can check the original; thread here- https://web.archive.org/web/20130524191250/https://bitcointalk.org/index.php?topic=1631.0
1st Version
2nd Version by satoshi, is Bitcointalk logo now.
In my opinion, the 2nd version looks better (really, a nice logo) and I just got used to this logo already, seeing it on this forum. But I didn't know that this logo was created by Satoshi, which I think adds value to this image, making it unique in its kind, because it looks like we will never see images created by Nakamoto again.1st Version
2nd Version by satoshi, is Bitcointalk logo now.
What the meaning of bitcoin logo?
I don't know if there's anything much to analyze as the most-recognized Bitcoin logo is literally just an orange circle with a tilted BTC.
Also, just a heads up: there's no "official" Bitcoin logo.