Hideho all,
Here's my take on this sensitive issue. For my Morris Sudokohi from last summer, I originally had the Saito 72, for about 60 flights or so, and loved it. Then I needed it for another plane so I swapped it for a YS 45. I like the throttle response better on the YS. Bam!@ right there everytime. 11X5 APC. Faster climb rate too, from hover.
I know all about the tork issue over 2 Stroke VS 4 stroke, I currently have a YS 120, 6 Saitos and one OS..and 2 YS 45 two strokes (many more, not relevant)..my favorite 2 stroke engine thus far in a 40 size funfly. For QHORS any cheap 2 stroke is fine w/me.
The GIles 3D I am flying now has a Saito 50, and although I wish it had a wee bit mo power, I'm leaving it in because it's so smooth in hover..and reliable tic tic tic idle.
It just wont blast out of hover...fly out fine out of hover, just not at bullet velocity.

Sorry for the rant, and got absolutely no where....I jus like talkin planes, man...