SW Wifi is still in its infancy from my experiences. Plus very few aircraft have it. That' such a pain. I have found Gogo to be much better than SW Wifi. Dont know the exact bandspeeds for both but what finally matters is whether you are connecting to the internet fast enough and reliably. in this aspect SW Wifi has some kinks to iron out. Same goes for gogo too. but SW is further behind than Gogo and hence,more catching up to do.