Here is a comparison chart of differences between the older Hobie Adventure Island 2014 AI1 Kayak vs the newer Hobie Adventure Island 2015 AI2 Kayak:

 

Hobie Adventure Island 2014 AI1 – Hobie Adventure Island 2015 AI2

Top Speed: 16 km/h (8.64 Knots)17.2 km/h (9.28 Knots)
Length: 4.88 m (16′ )5.05 m (16′ 7″)
Beam w/ Amas Out: 2.84 m (9′ 4″)2.90 m (9′ 6″)
Beam w/ Amas Folded In: 1.06 m (42″)1.12 m (44″)
Capacity: 159 kg (350 lbs)181.44 kg (400 lbs)
Fitted Hull Weight: 39.24 kg (86.5 lbs)48 kg (105.8 lbs)
Fully Rigged Weight: 52.16 kg (115 lbs)65 kg (143.3 lbs)
Mast Length: 4.62 m (15′ 2″)5.03 m (16′ 6″)
Sail Area: 5.34 m² (57.5 ft²)6.04 m² (65 ft²)