Wow you guys were busy last evening. First of all welcome Aaron622!
As for the term Ranger Tech/Super Speed hybrid, it was the first term that popped in my head while trying to define what I was seeing. I used it to describe the razor that looks like a 1947 Super Speed but has the Ranger Tech uncreased blade tray. I don't think the handle has much to do with defining those as I have one hybrid with the "shoulder" and another without.
The 1947 RT/SS hybrid has the uncreased blade tray and no notch
The 1947 SS has the creased blade tray and no notch
The 1948 SS has the creased blade tray and a notch
I also think the 1947 came with the plastic Speed Pak and the 1948ish on until 1959 or so came with the Blue Blade dispenser. I can't say for sure whether mine pictured above is original although I did receive it that way from another collector, logically there would have been some overlap IMO.
Honestly I forgot much of this information when I wrote the Rocket piece, had to make some room in my head apparently, so don't chastise me too much if I screw up.

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