Yeah they both have God Mode but OMFGB has far less options. It is meant to be as pure AOSP as possible besides a few small tweaks that almost everyone always wants. OMFGB on the other hand has a lot more options. You can modify lots of things like the status bar (clock, battery, date, signal bars), the lockscreen (type of lockscreen as well as carrier text), the stock launcher (can set screen number, endless loop, wallpaper scrolling, etc), and they add more settings in almost every nightly.
I recommend OMFGB. It has a lot more customization and honestly it doesn't bloat up the rom or anything. OMGB may be a bit faster but in no way is OMFGB slow.
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