Shimano XTR CS-m953 vs XTR CS-m952 12:32

[mezzanine]

Can't find much information at all on the CS-m952 XTR cassette that came out in 1998. Looks like it was only made for a year and then replaced by the m953. Both 9 Speed cassettes, could someone kindly let me know any difference and why the m952 cassette didn't last the normal product cycle timeline?

 

[mk one]

From what ive seen m952 was launched in 1999 and then in 2000 both the m952 and m953 cassette were available, as were the mech's until 2001. As far as i know they are both the same but they could be a slightly different design for the m953 mech? im not sure. They didnt change the design for the m951 as that used the same as the m950.