Cosair PC3500C2 with IC7_new bios 1.7

This old trusty Corsair rocks with IC7_new bios 1.7>>>>>
Now, I can run this mem with 5:4 @ cas 2/5/2/2 settings.
Lower timings can get pretty close to Newer PC4000 DDR with CAS 3/8/4/4.

Now the big question, Is 1:1 with CAS 3/8/4/4 really faster than 5:4 CAS 2/5/2/2 running at the same FSB ? How much faster? and worth the cost?

Heres the screen shots:

CPUZ:

http://us.f2.yahoofs.com/users/3f50...CPUZ_CORSAIR_PC3500_CAS2.jpg?bfrHLU_AB8plW8sA

Sandra buffered:

http://us.f2.yahoofs.com/users/3f50ab2f_11715/bc/pictures/__hr_Buffered_sandra.jpg?bfrHLU_A87U3PNU6

Unbuffered:

http://us.f2.yahoofs.com/users/3f50...s/__hr_unbuffered_sandra.jpg?bfrHLU_Az0j_FY3H