Met is friendlier for not great players. Twd is hard, almost stupid hard. There are tricks to making it a bit easier but that would be for another thread.
This is all irrelevant though!
Your wife is pushing for the buy and does not like the art on Twd so get met! They are both awesome games (mine are next to each other). I suggest you keep what sounds like a super lady engaged in pinball and get the met. Imo met needs an external powered sub FYI, cheap and ez mod.