The pricing is the same $5 per show (less for most Horace and Pete episodes), and anything you've bought before will be available the moment you sign in. You'll also get notifications for new shows and tour dates.

There is a question about how the app works on iOS: is Louis giving Apple a cut of in-app sales like other developers, or raking it all in? We suspect the former (at least if he wants to abide by App Store guidelines). If so, it might be best to buy that stand-up special on the web if you want to make sure that Louis gets his full share.