Chronic - non-symmetric all mountain freestyle
Stepup- symmetric, fast, stiff for park big air
Afterbang- symmetric, jibby, softer and built to be beat up
TC Ski - symmetric, wider platform with butter zones and carbon for pop.
all have fatty base and edge (it's bigger) for durability. thanks!
Compare here: http://lineskis.com/compare/skis?products=chronic-1213|stepup-1213|afterbang-1213|traveling-circus-1213