I've got 2 Super Speeds, and thought I'd do a little experiment to see if I got different shaves from each one. Shaved last night with the '62 (H3) with an Astra Superior Platinum blade. This was the 2nd shave with that particular blade. Shaved tonight with the '54 (Z3) with the exact same blade, prep, technique, and everything, and tonight's shave was vastly superior. Can't pinpoint any particular reason for this other than perhaps the '62's slightly lower profile head doesn't "drive" as intuitively for me. Anyone else experience the same between 2 different years of the same model of razor?