Not true. All of the new SOTM deploy straps are compatible with the older deploy clasps (94521813, 94521833, 94521883, etc) and vice versa.
The TI/Ceramic clasp WILL NOT work with the original tang-style straps that came with the DSOTM and GSOTM, and the original ceramic tang buckle that came with the DSOTM and GSOTM WILL NOT work with the new deploy style straps.