Why wonder....

Weight
Fusion 8HD: 58.4 lb, 25.6 kg
Fusion 6HD: 30.4 lb, 13.8 kg


http://www.fusionsynth.com/specs.html

The price makes it looks within reality next to the Korg, and from the light demos/ booth footage/ random features...the Korg and Alesis seem just as capable. Not something that should be given the price gap.