Any input on the Dolphin S50 (and counterparts) vs the Aquabot I2 (and its counterparts) Both are comparable in price Dolphin has tracks but no anti swivel cord. Aquabot has wheels and an anti swivel cord. Dolphin seems to scrub and the Aquabot seems to just brush. Any help would be appreciated Thanks This would be in a 16 x 32 Kayak above ground pool