Memory Type DDR3 ECC

You have to compare the latencies, which you can find in the data sheets.

typically ecc is slower due to the extra steps needed to verify the data

same with registered though registered mem is easier on the mem controller since some of the load is moved the register module

that said you will not see the differences outside of a benchmark.
ecc is generally reserved for servers and registered for high mem capacities both of which must be supported by both the mem and mb