I'll let Marek respond to this as well.
The F-Type is nearly as wide as a formula board, but the rail shape, rockerline and
tail shape are all "detuned" a bit to make the F-Type significantly easier to sail than a
true Formula board.
The F-Types won't get planing quite as early as a true formula board (or the Apollo) but
it will plane earlier than the Carves or the Futura or smaller Isonics due to the wider tail width.
Hope this helps,