Pontless comparison since attach rate always favor the earlier games.
Breath of the wild had over 100% attach rate for the month it launched. Mario Odyssey didnt achieve that but it still outsold BOTW.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.