I currently own two shell strops ( Westholme and Kanayama 70 ) and then own two Spanish Bridle ( one treated with Fromm's and one untreated)and then I have a English Bridle paddle and both Cordovan shells are quite different, i have tried Latigo and don't like it and i have tried Roo and don't like it either, English Bridle is very glassy compared to Shell but in all honesty I cannot tell or should i say my face cannot tell the difference in the different leathers I have tried, to me the only thing thats different is the draw.