Quote Originally Posted by pll View Post
The one argument I see for a SRAM groupset is that they have 11-32 cassettes (PG 1050 and PG 1070), compatible with Apex, Rival and Force. Shimano has up to 11-28 only.
With the Shimano road groups, it is possible to use a MTB cassette and a MTB rear derailleur to get lower/wider rear gearing. The only caveat is that the RD must not be a "new" DynaSys 10-speed derailleur - an older 9-speed (or 8, or 7!) is fine.

Of course, the color and finish won't match...