StarBoard vs HDPE

Sep 20, 2006
2,912
Hunter 33 Georgian Bay, Ontario, Canada
Is StarBoard just a brand name like Kleenex, Ski-Doo, Sea-Doo, vs. HDPE? I was looking at Amazon to buy a piece and both are ASTM D4976 but StarBoard claims to be "Marine grade". The other is listed as opaque "off-white". Is there really any difference?