I've driven them all, especially the midsize family sedans(the compact family sedans, less so) and they're all nice to drive. The midsize sedans are a better value and you get more for you money. Not more in terms of indiviual features but, in build quality, solidity, quiet/comfort, materials, trunk and or back seat room, and MPG is close. All of the midsize family sedans are BIG today. How big is big enough? Yes, the Passat is bigger inside but, does BIGGER matter when they're all kind'a BIG?
You just need to pick the vehicle that most closely fits you personal criteria(checks the most boxes for you). I found that all of the midsize family sedans standard 4 cyl had enough power for me and anything more is just more.
Question to ask yourself:
Does it have enough power?...standard 4cyl, turbo 4 or V6?
Do you want more rear seat or larger trunk?
Are the seats to you level of comfort(too hard/too soft)?
How quiet is quiet enough?
How many toys do you want in your car?
How BIG is BIG enough? I'm finding that they're getting too big for my liking. Where I am actually leaning toward(moving down to) the Compact family sedans today(Civic/Corolla/Sentra/Elantra-Forte' etc.). They're all moving up to the next size category according to the EPA spec's however, all cars are marketed for a specific segment.
The midsize family sedans... Passat, Sonata/Optima, Accord, Camry, Altima etc. are all approaching the "LARGE" car category however they're still marketed as midsize. Same with all segments. They're just getting bigger! Lots of compelling things to think about.