Mika is more conservative than Joe.
Mika is more 'moral' than Joe, but I use that term loosely here. 'Polite' might be more fitting because she didn't care for the Rush dig from Sykes, or any 'joke' about 9/11 and she pooh poohs much of any 'off color' comments by Joe, Barnicle or Willie's 'News you can't use'.
But there's another side of her 'morality' - a righteousness that goes toward fascism of controlling what people eat, ingest, use - in pesticides, etc. that would 'harm the environment or animals' and she makes no bones about making that mandatory. With regards to this stuff she's like any other liberal - she "knows what's best for you and it's for your own good" and will trample your rights to prove it - in fact, she has no concept of 'rights'. Joe has a semblance of 'rights', but he also compromises them for his own ideas of "conservatism".