Top tiers are all 3b + fighters that's all that matters
The very peak of top tiers in power are 4B class and beyond that is where WB and Roger sit as 5B fighters
FA Kong is 5B but who the hell thinks he's anywhere near Wb ?
FA sengoku is 5B but doesn't mean much when he and Garp are below Shiki (not 5B)
fA akainu is worth 5B but he's sickbeard level or slightly above until further notice
Garp is 3B as Admirals while prime Garp clears even Akainu and he's equal to FA Sengoku
VAs have 500M yet we know they aren't even all equals.
So in the end, CG bounty is more flawed than WG official bounties
It's all about marine ranking with 1-2 exceptions: Garp and Koby