Wouldn't it be best not to mix brands on some parts?

COMP Cams® warrants that all of the products are free from defects in material and workmanship, and against excessive wear for a period of twelve months from date of purchase. ... This warranty is valid on camshafts only where new lifters and proper valve springs are used, such as those found in COMP Cams® Kits.
COMP Cams® - Product Support Information

www.compcams.com/Pages/360/support-information.aspx

They may warrant it in writing, but you will have a tough time getting them to actually exercise that warranty. They will do everything they can to deny it.