No, you are clearly new to the game, Guardian is one of the few mechs that's actually balanced.
The reason that other Guardian hit you from further away is probably because it was a bot/AI that was using the Legendary System Crash Range implant which when maxed out increases Guardian's System Crash range from 30m to 45m.
I have every meta stuff in hangar but I still gave preference to Guardian and I'm gonna max out pretty soon. I have dual vrpg 16s. Just do what you feel fun to run, meta wont last but fun will. Remember Guardian is the only mech that can counter any mechs in the game. Rocks in FFA and other close maps https://omegle.onl/ .