After reading almost all 90 pages of the s200 owners thread I am just about ready to order. Now that Dolphin has the $25 rebate I am going to go with dolphin over the pentair warrior but I am getting frustrated deciding between the s200 and active 20. Everyone says there is no difference but then why 2 models? Why not just s200 blue and s200 gray? There has to be some difference but I can't seem to find anything.