Electric water pump

Most of the better known electric water pumps will move more water at lower engine rpm’s than a mechanical pump can, but the mechanical pumps will eventually move more water as the rpm’s increase, beyond that of what the electric motors Max rpm is. Which is better really depends on the application and system health.
Purely race with between round cooling hooked to a charger, weight, amp draw, street/strip use etc. Around town an electric is nice but sometimes it might not be enough at speed.