I put the Koruas in a snowsurf carving category. A dedicated carving board doesn’t have a long pointy nose - it’s for powder/slush. I also don’t like more than 1 cm of taper for carving hardpack - the board gets very backfoot driven.
Regarding the Bullet Train - I had a chance to ride it last week (my friend owns one). It’s the softest titanal board I’ve been on. It’s pretty medium stiff, I actually very much like that flex for a daily carver but that much taper and only 9.8 m sidecut still limits you in how much you can tilt a board without going uphill too quickly.
For reference my dedicated carver is Nobile N8 titanal 168 - around 160 cm EE with close to 13 m sidecut. A whole different level of carving. If I were to tweak it for my needs I’d make it 14-15 m sidecut while softening the longitudal flex a bit and lowering the taper to around 8 mm from 14 mm or so.