XBox Series X “CAPTURE & SHARE” vs REAL CAPTURE CARD – Does it SUCK?

The Xbox Series X features a “CAPTURE & SHARE” function that lets you record gameplay in 720p, 1080p and 4K capture… But is it any good?
How does the Xbox Series X’s Game Capture stack up against a dedicated external HDMI capture Card? Up against my own personal workhorse capture card, The Avermedia GC573 AKA the Live Gamer 4K?

I tested with;
WD 1TB My Passport SSD External Portable Drive: https://amzn.to/33MR0py [AFF.Link]
My 4K capture card of choice;
AVerMedia Live Gamer 4K (GC573) : https://amzn.to/3mKqnsZ [AFF.Link]