Only the G70 out of all those contemporary keyboards has Roland's TOTL action (IMO!). FantomG has a far more regular action. Just the weight and feel of the keys themselves is heavier than FantomX/G, and would add a fair bit to the overall weight...

It still amazes me that Roland don't use that action on the FantomG7. The best 76 on the planet! AFAIK, Roland have only used that action on one other type keyboard... the long out of production A70 controller (still one of the best MIDI controllers ever made).