Purely in terms of admissions, I think methods would be better. The gtown program *may* shape your research agenda, give you new ideas, but otherwise the effect should be marginal. That said, in terms of life experiences, trying different things, and figuring out if you really want to be an academic or a practitioner... the gtown program sounds more promising on that end. Or, you could hedge your bets and just do both. Max out on math and stats, and spend time on the hill.