The Ridgid is a lot more powerful, about double the torque. So, if you have a truck or vehicle with high-torque settings for the wheels I'd go with the Ridgid.
However, if you are already invested in one sysyem or the other (batteries and charger) you might consider sticking with that system, to keep things simple and save $.
The Ridgid will cost more ($199 in a kit). No way are you going to get it for $149 with battery and charger like the current M12 deal.