In the GOL/SML 2007 Tests they experiment with settings. They take certain modes and turn them off and on. Well it looks like with some of them off it does do better. Like here are the Beltronics STI Settings:

It looks like the Second Test did best. And my state doesn't use X so I turn it off but this test basically states that it will do better with x on. I understand having POP off that it would improve performance but why with X off does it do worse, why with SWS on and POP off it does the best, ect.