Is there a distinction? Can it be determined from looking at the clubs.

i thought z101 was a US only model. It was Tourstage's unsuccessful entry bid into the US. Although they were great irons!

The z101 model was a US only Tourstage offering. Very similiar shape and design to the MR23 CB U.S Specs including the tungsten weight behind the muscle. I believe there was a satin version as well that could be purchased from their tour/japanese department. Great irons overall, very easy to hit.

the above answers are all true

thanks.

We had the Zs over here in SE Asia but with the NS Pro 950 as the stock shaft offering. I have a US set that I just bought off ebay. When it is done reshafting I will compare with my buddy's Zs that had he bought in HK and had the NS Pros.