If you want for waves get the float 100%. 5.5 float also has power of a 6 unit and has shorter wingspan
@FranP are you sure 26 unit has less dihedral as your 2 pics clearly show the 26 has more. I've not measured but tested 4m unit & 4m Float back to back on waves and Float was way way more stable of flag handle. Unit much easier to tack and rotate due to more dihedral but I did not have a 25 to compare to
100% sure it has less diheadral. Obvious to notice when you check two wings together on the beach, and also it's performance (faster and better upwind) is consistent with the new shape.I have the Unit SLS 2026 in 5m and my colleagues has other sizes.