The Texas Con site says Peter Cullen is only there Saturday, so it leaves it open for him to be flown in and out of BotCon for a day or two.
But if FunPub had booked him first, he wouldn't be available at all to the Texas one.

This is going to seriously impact on BotCon's numbers, as many of the Vintage fans who have already lost faith in FunPub, will probably go to the Texas one.