FWIW, I just did a SxS comparison using a Schick I 2 injector loaded with the modern Proline blade and my Schick M Model adj. loaded with a NOS Gillette Platinum Plus injector blade which is my favorite NOS blade for these. Both blades had one shave beforehand respectively.
The Model M gave the better shave of the two, although I believe moreso due to the perfect dynamics (at least for my handsome face) of this razor. Note that the Proline blade shaves just as well WHEN loaded into the M Model. Very interesting. Needless to say the Model M is my "go to" injector as you can tailor agression perfectly for your face. Purportedly, the I Model uses the same head as the M, but they shave differently as least for me. YMMV.
Secretary Ramsey put his foot into it yesterday . . . in the course of his remarks he said that California “needs water and better society.” “So does h-ll,” yelled someone in the crowd.