A Very She & Him Christmas (2011) vs Darius Rucker: Home For The Holidays  (2014):
I acquired both of these albums very recently  and I guess in the interest of full disclosure I should reveal that I haven't actually finished listening to the Darius Rucker CD yet. 
A Very She & Him Christmas is what some might call minimalist. There's Zooey Deschanel and there's Matt Ward and there are the smallest number of instruments possible on every song. The instruments are played softly, the songs are sung low and the whole thing proceeds at a pace that would make a turtle say, "Dude, that's kind of slow." 
Nevertheless the CD is very enjoyable. Again, if you are looking for something to sing or dance to at your Christmas get together this is not the disc for you. However if you want something to play in the background while you're wrapping presents or having a romantic date during the holiday season you need look no further.
Some of the reviews I read online said that they found Zooey's singing flat, emotionless or just plain bad. But I suspect those people were missing the point. She isn't trying to set new holiday cheer world records, nor is she trying to out sing previous performers or the instruments. The entire thing is meant to be slow, low and dreamy.
One song of note is their version of Baby It's Cold Outside. In an interesting twist, they switched the roles and she sings part usually sung by the guy. It worked well for me. The Pook said she liked it better than most other versions of the song. 
A Very Hootie Christmas is exactly what you expect it to be. It's Hootie. He's singing your favorite Christmas songs  in a way that sounds exactly like Hootie singing Christmas songs. He's got that resonant deep voice. The music is grand and full. This is exactly the CD you want playing in the background at a Christmas party. It's great.
A Very She & Him Christmas (2011): B+
Darius Rucker: Home For the Holidays  (2014): A
 - A.K.A. - A Very Hootie Christmas
 - "Acquired" meaning bought on Amazon and "recently" meaning yesterday.
 - Of course that isn't going to stop me from grading it.
 - What? Everyone knows turtles are kind of hip in an old school way and say things like "dude" all the time.
 - But then again the Pook hates that song. She calls it the "date rape song".
 - Including Baby It's Cold Outside. Sorry Pook.