Hi! I doubt that this is not 100% true. It seems H7 engine in some ways sounds completely different to H6 engine in the regard of Analog Synth zone. It was described here HALion6 and H7 engines Analog Synth Zones Sounds Big Difference (same for HS/SE3&HS7, Rtrlg 2.x&2.4)
It affects the consistency of patches (eg POLY from Sample Fuel) that made use of H6 sound characteristics.