Nope.
The F-5EM/FM got a new radar(Grifo F), new EW systems, data-link, structural modifications, new HUD, MFCDs, CCRP/CCIP, GPS system, Derby and Python IV missiles, etc.
Here are the structural modifications:
F-5E:
F-5EM:
I love the EF Typhoon, certainly it's a Super-Fighter, and I believe that EF Typhoon will be the best Dogfighter in DCS(my guess), but I would prefer the Dassault Rafale :D :D
9.5 tons of payload capability:
It's beautiful:
Dude, I don't have enough knowledge to talk about this subject, but keep in mind that it's not so simple, just because it's a 2x 30mm cannon, doesn't mean that it is powerful.