multiplayer testing with steam or epic - service?

Yeah, I have tested with it, in case it is this: https://www.reddit.com/r/unrealengine/comments/6b18hs/lpt_simulate_lag_if_youre_making_a_multiplayer/
I hope you mean this command…
No real troubles, but sure you notice something with a high lag. So still, how is the epic service for multiplayer? Should I switch and when would you recommend it?