Seems like there are a lot of weight savings in the head. The biggest being the switch from wood to metal heads a few years ago. A lot less wiring and boards there too with the spike platform.
Not sure how much the new LCD may have added back.
I get a lot of different feels across machines. My TWD Prem feels different than AS, IM and others. But I also find other variables, like the flooring material and leg tightness also play into how a particular machine feels.
I only have about a dozen plays on my AS Pro and haven't loaded new code yet, but I am optimistic this will be a really good machine.