based upon the USGA Conforming Golf Ball List you can find at USGA List...
Page 15 lists the Kirkland Signature ball with these specs:
Kirkland Signature with Signature in red white 4P-SC-3c M-H 360 KOR Nassau Golf Co., Ltd.
Marking: Tour Performance
Page 17 lists the Nassau MF 4L with these specs:
Nassau white 4P-SC-3c M-H 360 KOR Nassau Golf Co., Ltd.
Marking: MF-4L
Exact same specs.
From wrx