I recently picked up a new 85cm Carbon mast/fuselage (after a long wait for availability). I can't say there's a huge difference between my V1 alu foil. It does feel a little more solid & stable underfoot &, of course, it's lighter, although not by a huge amount - about 700 gms. The V2 alu foils have a beefed up mast/fuselage connection which presumably makes them heavier. I'm guessing that the main point of this is to handle the force created by the large front wings used for winging & surf foiling.
I was interested in getting a new front wing - either a Curve MT or a Fluid - but they just haven't been available up to now. I ended up getting a new Curve M which came with the 40 cm/250 cm2 Kite stab. Up to now I have been using the 40cm/210 cm2 Surf stab which is anhedral. The Kite stab is flat ( and somewhat smaller). First session today & the difference with the Kite stab was quite noticeable: less stable in a straight line & carving, but more slippery & faster feeling. As you would expect, it feels less draggy in a straight line. Interesting that the new Curve stab is anhedral with winglets ... which is the same shape as the stab on my 2018 LP foil.
Ours has just posted a video explaining the new Gong foil line.