The GE system looks impressive at 60% and specific fuel consumption of 123 gr/kwh, though I have no confidence in the KW measurements of a turbine engine. It must be derived from thrust and drag force vs speed. I am inclined to see the 60% efficiency as wishfull thinking, though I know immense progress has been made in the field of airplane turbines. If they are even close, that is very impressive for a non-stationary powerplant.
So far, all the better performers are very large diesel engines especialy ships diesels. The 48% I mentioned was a two stroke in the sixties, not too large, and without heat recycling, like the Modern engines.
My memory fades a bit, but if I recall correctly, specific fuel consumption was about 168 grams/kwh or something like that.