i have been riding the x surf 5'10 at home for a bit and have now ridden the kontact and pro boards.
really impressed with this years x surf, much better than last years in my opinion with thinner rails and the channel which makes grabs really good for strapless airs.
would say volume wise it feels around about 27L when i surfed it which is what all my surfboards are and is prob what the 6'2 pro is as well. would say the 6'0 xsurf is around 29L.
both the pro and x surfs surf well just depends what type of waves you ride.
the 5'10 x surf is going to be my go to board for waves up to head high cross and onshore where as for cross off up to 2x head the pros are amazing as you can see with the way Patri is riding the 5'11 here at One Eye
looks, weight and feel are really good this year and you won't get any paint coming off as was a prob with last years models.
be sure to test a couple out and see what best for you or of course you could go for the Wam which is a great all round kitesurf board and perfect for a 1 board quiver!