I have been through this myself, a axis 660 kite foil set up will work well and also can prone on it if your lighter or large surf.
However if not you just change the front wing for what you wish to do.

Yes you need a kite foil board sepperate from a prone board
However spend money on a correct prone board, the kite foil board there's multiple used and can be obtained at great prices.

Jon at surf fx is very patient if you check in with him, as foils can get overwhelming
I'm sure other will add to my answear

My pick is AXIS

Thanks a lot for the replies. Do I understand you guys correctly?

A board which I could prone surf foil on would probably be way to cumbersome to kitefoil on and I'd probably be better to get 2 boards?

I could potentially use same foil but I would want a larger front wing for surfing as it would plane at a lower speed?

What would it be like using a surf/sup foil (with a kite board) to begin with kiting? Would the shorter mast and higher volume front wing make it easier to get foiling earlier and maybe shorten the learning curve?

Any thoughts on this?
www.seabreeze.com.au/Classifieds/Kitesurfing-Foil-and-Race-boards/~l670c/2019-Airush-Ak-Surf-Foil-4-9.aspx?_page=5&search=p%2FeVEIELGOY38OJR4wnDzg%3D%3D

Hi Alex,

I think you need to be clear on what exactly you want to do with your foiling. There are so many ways to kite foil but realistically only one way to prone foil. Considering this, you would be best to buy something better suited to prone foiling. This however will dictate the way you kite foil.

Kite foiling with a prone board and foil is totally fine providing you don't want to ride really fast, use it in overpowered conditions or do foil freestyle. If your aim is to ride slowly and catch waves, then the prone foil and board will be perfect under a kite.

An ideal board and foil setup would be something like the Fanatic Sky board and a Fanatic High Aspect 1750 foil on 750 mast. Perfect for prone foiling and pumping and I have kited this exact same rig. Its great fun in light to moderate winds on a kite like the Flysurfer Peak4. I even managed 20 knots board speed on this rig without straps. Super fun.

You can take it a step further by using a Moses foil as they have really high top speeds and insanely low stall speed. This gives you the best of both worlds. Look at a high aspect set like the 1100 wing on an 82 carbon mast, You can also use the 683 or 633 front wing if you want more manoevreability in the surf and higher speeds when kiting.

You do NOT need two boards or even two foils so long as you are clear of the limitations of the foil in certain conditions. Moderate to stronger (15-25+ knots) on a surf foil will be challenging with the shorter mast and bigger wings, but <15 knots and a Peak4 will have you loving light wind days and foil surfing.

DM

Never try to save money by getting gear which you would use for two different codes. You will end up abandoning both.

The foils for prone surfing are twice the size to those for kiting. Sure, you can kite on a prone foil and vice versa, but a prone foil will be slow and tedious for kiting and you'd need to be very good with large surf to prone with a kite foil.

The boards are comparable... just. A large kite foil board is a very small prone board.

I kitefoil in waves with a Slingshot Alien Air 4'8" and either a Slingshot H5 or Moses 550 foil (I prefer the Slingshot for waves). The board is marketed as a crossover for proning but that's crap unless you really know what you're doing. But you wouldn't want to go higher volume for kiting.