While I don't have a futura, I do have an isonic 111, plus a similar sized HiFly (bump and jump). Both are equally fast (7 years sailing with a GPS), but the HiFly gybes better and is MUCH better at chop hopping.
The foot straps on the isonics are wide/near the rails and jumping is crazy without your feet near the center line of the board (at least for me). Stay with the futura.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.