Well,I would not root for the JW because they 'burned me bad' as far as I know a Mormon never screwed me.As a matter of fact I once worked for a LDS and made good money.

Here goes on JW:
A) They are at your door to recruit you for their watchtower society corporation,they will say that *we are just here to share a message from the Bible*... this is deception right off.
B) Their *message* creed is a false Gospel that Jesus had his second coming in 1914.The problem with this is it's not just a cute fairy tale,Jesus warned of the false prophets who would claim *..look he is here in the wilderness,or see here he is at the temple*.
C) Their anti-blood transfusion ban against *whole blood* has killed thousands.
D) once they recruit you they will *love bomb* you in cult fashion to also recruit your family & friends or cut them off.
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My family was spiritually and financially swindled by the Watchtower society,3rd generation Jehovah's Witness Danny Haszard
*Tell the truth don't be afraid*
FMI
http://www.dannyhaszard.com

We Episcopalians believe in a good drink.

...any more than I'd root for one side or another in a debate between a neocon and a teabagger -- or, for that matter, cheer for one side or another in a sporting event in which I had no interest in either team.

Speaking as a Catholic, I wouldn't support either one. I believe that Mormonism is pure crap as a religion, and has only a tenuous connection to Christianity. The Jehovah's Witnesses have, among other things, re-invented Arianism.