I'm not expecting major performance gains, or for there to be any real difference between the two in terms of power, but I am wondering about people's experiences regarding:

1. Ease of install
2. Flexibility when moving from areas where 93 octane is available to where only 91 is available
3. General driveability

My local tuner with a dyno will sell me the Cobb tune, whereas I'd have to order the Sharkwerks tune from Alex in CA.

What's the forum consensus on the best way to go?