pancake,
In the case of a failure as in the original post, retracting the tabs involves disconnecting the actuator and retracting it manually. With Bennetts you just loosen the nut on the pump housing and the piston retracts by itself with just a little loss of fluid. As far as installation goes the only difference is the installation of the pump at the transom. The Lenco tab wires have to run to a control box just as the wires from the Bennett run. You can adapt the Lenco to the Bennett tab.
Some people prefer the faster action on the Lencos but I like the control from the slower Bennetts. That's a matter of likes and dislikes. If you trailer a boat, I think the Lencos are less subject to problems. I keep my boat in the water 24/7. In defense of Lenco, the replacement control box was an improved model but I still had a piston fail again. For me it's too much of a pain to have the boat hauled and go through the install again. I've taken Bennetts that I bought in 1983 and installed on one boat and removed them in 1992 to install on another boat. With the exception of replacing a joystick operator, they are still going strong on my friends boat.
As far as your tabs go..If it ain't broke, don't fix it.