What's funny is I actually had this discussion with friends recently, comparing all kinds of NS and Lib/Gnu decks. My Heritage, Cobra and ProtoHD are all lighter than the equivalently sized Gnu RC, T.Rice, Jamie Lynn, Dark Series, etc...
18 Snoplanks Asym Fish . 18 Arbor Terrapin . 17 NS Maverix . 17 NS Twenty Five . 16 NS Swift - 14 TJ Brand Retro Fish
18 Rome Katana . 17 Burton Malavita Wing . 16 Burton Genesis X
16 Flow Talon