The GLC is an aged platform and its driving dynamics: stopping, steering, chassis controls, transitions are completely different than the Porsche. The 63 is stiffly suspended and it drives like a muscle car--the entire focus is on the engine. The engine is glorious with enormous low end torque. It does not like or need to be red-lined.I would imagine the technology and driving dynamics in the Mercedes GLC AMG 63 are better than the Macan GTS and the tech is better in the regular GLC. I know my ordered AMG E 63s wagon is light years ahead of Porsche in tech and the driving...well just watch some YouTube videos and make your own opinion. The video on a road course following a 911 is fantastic and almost passed it a couple of times before it missed the entry point on a corner and faded back some. It even has dynamic motor mounts and a few other goodies to help with the handling. The 2.9 0-60 (which is the same time as a C8 Corvette) isn't too bad either for a 4600lb family and grocery hauler.
As far as tech, several safety systems are accounted for in the MB if you are willing to pay for the driver assistance packages. The tech has been grafted onto an old interior space so some of the buttons and controls, say for the parking assist, are seemingly randomly placed in the cabin. The E is two iterations newer than the GLC in terms of the infotainment and maybe tech, but the video game like interior space is not likely to age well IMO.
The 63 motor inspires plenty of stoplight dashes, but whether that motor is in the GLC or the E wagon, you will not be wanting to chase down Corvettes, 911s, or even Macans.
The E wagon could be a great choice for some and I would be happy to see it in my driveway, but having had an AMG, I would be careful to not get drunk on the Kool-Aid.