I have the English late 50's Tech and I also have the PAL, an English model of the 100 (STAR). They are both close, and probably more efficient than the US Techs. I also have a WW2 Canadian Tech I have not tried yet.Both my choices are non-Gillette's:
#1 Schick Krona (Mild, super efficient and works with any blade) Best kept secret in vintage!
#2 Star Model 100 (Mild but a notch up from Gillette Techs in term of efficiency) A hidden gem!
I tried out a couple of Tech's and sold them both. Super mild but zero efficiency.
The only Gillette I've kept is the Slim adjustable!
The English Flat Bottom simply blows all the other Techs, and the PAL out of the water.
If you have not tried one, I strongly suggest you do. Some say the RFB beats it. I don't know, but the EFB is a killer good razor.