I never ever recommend Comodo products.
If you can pay G data is a very very standard security suite.
Else choose KAF or BD free...
* Stay away from Comodo*..
Comodo has no comparison to G data in Security terms, Response to newer threats, Cloud and Pro active modules,
Comodo relies on sandbox that even quarantines U and ME..!
comodo / you dont even notice with default settings comodo is working
protection / if gdata or others havent any signature or malware hasnt any similar malicious acts like others malwares it willl destroy their security terms
Lots of great feedback. I haven't tried both in a very long time to I cannot say for sure which way to go. I agree with @ZeroDay, you've installed Comodo, give it a try for at least a few weeks and see what you think. Who knows, you may like it more than GData, but you won't find that out until you try it for a bit. If in the end you don't end up liking Comodo, you can always go back to GData since you already have a licence.
At the end of the day, every program will have their pros/cons and protection wise there's no such thing as a product that will protect you 100%. You've gotten a lot of great info from some of the members here, but remember this is your system and your money after all, so you are the one that has to be satisfied in the end. Don't worry about trying to seek approval or acceptance with which ever decision you decide to go, as I've already said, you are the one that has to be happy