I remember, it was the first blade I ever used in my first DE razor - a Gillette Tech with aluminium handle.
Well, how do I put it ?
For many, this is the best blade in the world. I admit, I had at least 4 BBS shaves from each blade with my Tech. I shaved with them in my Fatboy too. Same result, but I had to be careful with the settings. They also did the same well in my Superspeed.
So, without testing them at this occasion, I can tell, that this is the upper class blade. However, I'll give it a try here later on too.