Ok 4hp ist a bit (some 20%) littleer than 4kW. but all the other things are right.
I couldn't find better technical data, the weight is only estimated. If a small weiler commodor weighs around 700kg, then the colchester is at least as heavy.
In difference to warco the colchester has only an unregulated 3~ motor with a big gearbox, that reduce the speed while increase the torque. If you want to drill a hole with maybe 30mm, you will see the difference.
The Warco has a DC-Motor, which you must maintain regulary, the control unit can be (not must) fault-prone, while the 3~ motor is nearly indestructible.

And if you want a DRO, you can assemble it to the colchester as well.