I am glad I read this thread to the end, because billsfreak said what I was thinking...
Something that is so rarely true, but I am happy for it to be so in this case.
If I understand this correctly, the "All-Pro" team is voted by sportswriters, and is a starting 11 on both sides of the ball, with a second team as well, but the distinction between first and second team is clear. There is inevitably some overlap with the Pro Bowl, but since the PB squad includes pretty much a full roster (50 on each side, no?), it is much less exclusive than All-Pro.