Perception Kayaks Sit on Tops questions.......

I am so confused about these 12' and 13' S.O.T.s



academy sports in rock hill
12' pescador $500

dicks
12 caster 500

rei
13' triumph 700

sports authority
12' destiny 650




I understand that Perception, Wilderness Systems and other mfgs are under the name of Confluence Kayaks.


But can anyone tell me what are the advantages and disadvantages of each kayak, listed above?