I just compared the Horns Ensemble Legato, its superior in SINE in every aspect.
First off all in kontakt its sluggish and the tails collide and smear... sine has NONE of that.
Kontakt has 3 layers p-mf-ff and SINE p-mf-f-ff. the kontakt ff sound more like f though it has a bit more full body sound that suit orchestral horns. in SINE the ff sounds like ff, the whole dynamic range is smooth. the attack is a bit better so its a bit more agile.. not Jasper agile lol
OT weren't kidding about recording "another layer"!
The sustain in kontakt again same 3 layers, in SINE 4 layers which go to real ff.
And on top of that there is another patch called Sustain Bold... which is a single FFF layer if you must want to do epic with OT