Inliners International Forums General Discussion Hi Performance Help ID Chevy Cams

I pulled this info on the Isky cam off Summit Racing:

Brand:Isky Racing Cams
Manufacturer's Part Number:231525
Part Type:Camshafts
Product Line:Isky Oval Track Solid Flat Tappet Camshafts
Summit Racing Part Number:ISK-231525

Cam Style: Mechanical flat tappet
Basic Operating RPM Range: 2,000-6,000
Intake Duration at 050 inch Lift: 228
Exhaust Duration at 050 inch Lift: 228
Duration at 050 inch Lift: 228 int./228 exh.
Advertised Intake Duration: 268
Advertised Exhaust Duration: 268
Advertised Duration: 268 int./268 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.525 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.525 in.
Valve Lift with Factory Rocker Arm Ratio: 0.525 int./0.525 exh.
Lobe Separation (degrees): 109
Intake Valve Lash: 0.025 in.
Exhaust Valve Lash: 0.025 in.
Grind Number: 525-A

But this one is a 525-B, is there a difference?