Pelican,
Electric trim tabs are way better than hydraulic. The first controllable trim tabs were hydraulic and pretty much all that was out there, When electric tabs became available, it was a game changer. All of the moving parts are in the cylinder, that controls the tab. From there to the helm is simple plug and play wiring. No hydraulic pump in the bilge, no leaking oil in the bilge, no electric solenoids in the bilge to rust and stick.
Now, even the king of hydraulic tabs has become a believer and sell electric...
So, I have had Lenco tabs on my last ten boats and have also had them installed on Corps of Engineers boats, as well as past USCG boats.