Crown and QSC are interchangeable in some lines.
You cannot compare a Macro Tech with RMX. RMX is entry level. Macro Tech was Crowns former top of the line amp.
You have to compare similar amp topologies in their power class.
Both manufacturers make amps for a price point, and then they make the serious tour grade stuff. Any two amps that are working properly, under the same load, should sound pretty close. What you are hoping to buy is reliability. Both are great. Both have had excellent service.
I can speak for Crown outright replacing amps with issues, no questions asked.
As for paying for a name...well I hope I AM paying for a name. A name that represents a company with excellent engineering, excellent manufacturing, excellent support, and looooong warranties. I want a name that my clientele will pay to rent without thinking twice. Crown and QSC are at the top of that name list.
Your friend has no idea what he is talking about.