I have both and reach for my 1/4 drive impact swivel sockets more often. In fact, unless it's a weird spot when I'm using a Ko-Ken nut grip swivel, it's pretty much impact swivels most of the time.
I have a set of Matco 1/4 drive impact swivels that are pre pinless design but, they don't have a collar so, their range of motion and ability to fit into most areas is great. A fat collar on a 1/4 drive impact swivel just makes the socket a turd regardless of whose name is on it.
Back in the day before cordless stuff was commonplace, i used to use a screaming 1/4 drive air ratchet for light stuff like trim and upper engine work. It was a killer of truck brand chrome 1/4 drive universal sockets. The pins would vibrate and loosen after prolonged use. that's when i switched to impact swivel sockets.
