Comparing 2 boards

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

Chemistry Surfboards Chem Zen

Chem Zen

Chemistry Surfboards

Length
4'8"–7'2"
Volume
Shape
funboard
Fin setup
Five fin
Video
2 clips
Roberts Surfboards DIRTY BIRD

DIRTY BIRD

Roberts Surfboards

Length
5'6"–6'8"
Volume
Shape
shortboard
Fin setup
Thruster
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.