The net weight of the Sailor is 9.3kg, which is ultra-lightweight by inflatable SUP standards, while the Rainbow R weighs 10.3kg. Thanks to the lightweight, Sailor is able to surpass Rainbow R in terms of speed and transportability and is more suitable for ladies and kids. But Rainbow R is more stable and stronger than Sailor. If you only use an Inflatable SUP board for flatwater paddling or other recreational purposes, Sailor would do just fine. The Rainbow R is more versatile so if you want to challenge yourself to more complicated usages of the board like SUP yoga, whitewater paddling or SUP fishing, the Rainbow R might be the better choice here.