Smaller dedicated windfoil board would be more manoeuverable but it's probably less of a difference then you think. Those Naish jet HA foils are massive, not whatI'd associate with manoeuverability windfoiling in strong winds.
You'd be better off getting a Naish micro hover if you wanted something more manoeuver oriented. Mainly because I suspect you will have some tuning issues trying to get the Naish foil to work well with the wizard, especially as the wizard I'm pretty sure is Tuttle box, and the Naish out of the box doesn't have shims for tuning the rear stab. You should try stick to a board with tracks.
The Naish runs the foil mast quite close to the front wing compared to most other brands, so usually if you are running a Naish in other brands gear you will have to move your footstraps back and have the foil mounted forward in the tracks to make it balanced.
Forum post of someone dealing with the opposite of what you are looking to do, but having tracks gives them tuning options you won't have.
www.seabreeze.com.au/forums/Windsurfing/Foiling/Slingshot-76-and-Hover-122-Questions-after-first-flight?page=1Photo of Naish vs fanatic as an example.