FWIW, the Fantom G7 is the lightest workstation of the Big Three. Korg's M3 is the heaviest and it only has 73 keys.

Korg M3-73: 38.14 lbs (17.3 kg)

Yamaha Motif XS7 37.47 lbs (17.0 kg)

Best,
Mike
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Yamaha Genos, Mackie HR824 MKII Studio Monitors, Mackie 1202 VLZ Pro Mixer (made in USA), Cakewalk Sonar Platinum, Shure SM58 vocal mic.