Originally Posted by Grasschopper

Again it doesn't really matter if it is BB30 or PF30. BB30 uses an aluminum sleeve in the BB that is machined to tight tolerances and the bearings are pressfit into it. PF30 is the same width and uses the same 30mm spindle cranks but the aluminum sleeve in the BB is omitted the the BB assembly has a delrin cup set that is pressed into the frame. They went this way because the frame tolerances don't need to be nearly as tight and the delrin cups should help reduce the creaking issues many people have had with BB30 and other pressfit standards.

Here is that chart. 46mm Carbon BB is PF30, 42mm Aluminum BB is BB30.