Eaton makes a lot more than just our Z71 auto locking diff piece(The pumpkin themselves are made by DANA). I am willing to bet that they have e lockers and air lockers and such available that will work as well. I would look them and others up. Easier and cheaper than replacing the whole diff.
Otherwise... for me... I prefer having the diff lock up and unlock on it's own @ speeds up to 20mph like ours doo. I don't like leaving a diff locked while out on the trail. So having to slow down/stop/press buttons on a surprise rough spot isn't something I am personally interested in.
Especially in scenarios when momentum is your friend. I am pretty sure I would forget to unlock it and snap an axle or something anyways. I would still be happy with either one though. When you need it you NEED it.
2018 Chevy Colorado Z71 4WD Crew Cab V6
Prior vehicle: 2005 Chevy Colorado Z85 Crew Cab 2WD 4cyl that was traded in with 223,000 miles on the odo.