In Ben's recent lesson Wayfaring Stranger in A min, he has a lick at the end that is pretty easy with a capo but not as easy in open G.
One of the reasons why you have so many licks in G and C and D is because you can use a lot of open notes for these in Open G tuning. In A and B, you don't have many of those open notes in the scale so it's easier to use a capo so you can take advantage of the open notes in an Open tuning.
Because it's easier to play in A and B when you're capoed, you don't see so many players playing in those keys without a capo and therefore, there aren't established licks. But, as in Wayfaring Stranger, because the frets are closer together higher up the fretboard, when you're in those keys and capoed, there are going to be some licks that are more natural to those keys than playing in G or D or C.