Home of Rhett & Link fans - the Mythical Beasts!
Hmm, well it looks like they already added at least 1 new song between the time they did the NC State Fair concert and the London concert. Rhett learned/is still learning how to play the piano more proficiently, so he debuted that at London, and he mentioned on the Mythical Society that he's bringing the piano to the rest of their concerts, as well.
My guess is they probably haven't changed it much between London and the shows they're doing in April, but the June ones could have some more song switches or additions. :)
The banter in between the sets was mainly about being in London for the first time (properly), so obviously that will be different.