Depends on your style of driving... The 2013 makes insane power on the bottom of a already powerful bottom coming from the B5.
I honestly think you'd be ahead with the 2057 as most guys run that combo on buggy and the 2013 on a truggy setup.
I am currently running a 2013 on my buggy and no reaason I should be running that setup on my buggy (ask Mo he'll tell ya...LOL

) but I am.
the 2057 will just be easier to drive as it smooths out the bottom end... But still it's up to you and what you prefer...
2013= TONS of bottom and harder to drive
2057= smooths out bottom and is easier to drive
-DC-