OBD11 seems like its a much more user-friendly boiled down version of a handheld scan tool that also has some presets to change/monitor things around in your car.
VAGCom is a full fledged dealership level diagnostic software. In a lot of ways, 75% of what VAGCom does is not needed by the average forum member; but the one day you need it you will be very happy you have it. I've used my VAGCom cable probably 12 or so times in 8 years with the car and every time its been a life saver. Even my mechanic asks me to answer a few questions with a scan sometimes since he knows I have it and he can help me without my car needing to take space up in his shop
The one cool thing about OBD11 is its powered off a cellphone, i've tried using a USB A-> USB C adapter but never got the VCDS cable to work with any apps on my phone. I'm not crazy on how OBD11 already charges for their hardware and then goes and tacks a pro version onto their software as well...in addition to their 'credits' you have to/can purchase in their app. As an IT guy, I've been there and done that with all software business models before - I like to stay away from any apps that run that business model. After you've paid for the hardware and have all the apps set up, they can push a single update moving features behind the pay wall and if you end up wanting one of those features you are now stuck paying for the pro license. I'm not saying they will do this; but we can also assume most new and exciting features will be behind that pay wall as well.
With VAGCom you are getting full access to everything without any surprises and their is almost an infinite amount of documentation out there about how it all works already.
people get intimidated by the VCDS software, but I've never had a question that wasn't answered clear as day in their documentation:
https://www.ross-tech.com/vcds/tour/main_screen.php
between that and a few youtube videos you can literally make money charging others to code out bulb errors and stuff in their cars.