I'm guessing there must be a problem with your Old Type. Maybe it's a bent baseplate or cap. The Old Type and the NEW SC clamp the blade equally rigidly IME.
Cal, thanks. It's partly a tounge-in-cheek comment about the SC's famed blade rigidity quality.
Also - more seriously - I was using a 40-year-old Schick Krona blade, just for laughs. Never used a vintage blade before.
Will say. Never use a questionable quality ancient blade in an OLD type. Not a good combo, no. Maybe that blade would work in a super-mild razor, but that mean OLD gave a very *uncomfortable* shave with it. Sharp, close, no weepers, but lots of aftershave sting. Lots.
AA