Comparing 2 boards

These two are a long way apart on volume, so they are not really alternatives to each other.

Big Sun ISLAND TWIN

ISLAND TWIN

Big Sun

Length
6'0"–8'0"
Volume
42L
Shape
shortboard
Fin setup
Twin
Video
Big Sun TWIN KEEL

TWIN KEEL

Big Sun

Length
5'6"
Volume
29.9L
Shape
fish
Fin setup
Twin
Video
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Up to 4 boards at a time. Volume and length are the shaper's published ranges across all sizes of the model, not a single board.