Agree, the British Fat Handle Flat Bottom Tech (long name...) is hard to beat.In my opinion, it's very hard to beat the quality shave from a British Gillette Flat Bottom Tech. That said, I really like the Yaqi Tech head. It's cheap and shaves very well PLUS covers the tabs (a pet peeve of mine about which Gillette has never asked me my opinion). One of the razors I learned to shave on, though, was a simple REGUS 1957 ball-end Tech. It's a great razor and will continue to be one for several lifetimes.
The only Tech I think is better is my British brass Ball End Tech.
It's a bit more efficient than both my Fat Handle and my aluminum Ball End.