I own both MET (premium) and AS (premium). They are both great games in their own way and I won't be getting rid of either anytime soon. MET is hubby's (I got it for him for his birthday in 2013) and AS is mine.
If you get the AS and already have MET and are planning to keep both for a bit...You will see they are both different and both worthy of the "love" they get.
Phoebe