Superior in what? Windows offers surf protection and BB
Personally I stick to User Account Control, SmartScreen, ad-blocker and I occasionally enable Windows Defender for signature/cloud scanning; you could say this is really bad security practice but it works for me and I am comfortable with it, and require nothing more.
You may be wondering, "Why am I telling you this?". The answer to that is because I believe from personal testing (not with just individual samples found from various sources, but manually testing specific attack techniques through custom samples which would obviously have never been seen before to cloud engines) that the Emsisoft Behavior Blocker has the potential to protect the user much more compared to the current dynamic implementations from Microsoft. Does this mean I think that the behavioural monitoring now being provided by Microsoft is not very good? Of course not. I may not utilise such features, but I do use Windows Defender from time-to-time and it works well for me, so I know that either solution can protect you if you make good decisions as well.
Microsoft are bound to improve and they tend to focus more on business protection regarding security than specifically Home users (not even at an equal level actually), and I believe only recently awhile ago they started cracking down on mitigating injection techniques such as dynamic forking (process hollowing - replacing a process' PE image with another for concealment of operations) and atom bombing (known technique since 2016 and documented via open-source code available over on GitHub), and chances are this sort of mitigation implementations were only aimed for business users. I am pretty sure Emsisoft could have stopped dynamic forking even back in Mamutu days, and they will block Atom Bombing for sure (no way they would have let that slipped).
Maybe I am wrong or am just talking rubbish, so to the resolve the situation I will re-phrase what I said appropriately so there is not a misunderstanding between you and I:
I personally believe that if Emsisoft Anti-Malware is used to its full potential regarding their protection components, it would provide enhanced protection compared to using Windows Defender to its full potential (with the tweaks performed for features such as Behavior Blocking).
Regarding web protection, I would trust Emsisoft a lot more overall for both privacy and security. I would never have a doubt in my mind about collection of search history and/or selling of it for quick cash due to their impressive ethics (compared to other famous vendors), and I would suspect that they are quicker at adding malicious hosts to their blacklist databases and have better web-based heuristics (should they have such a feature internally implemented - I am not sure).
At the end of the day, even though Microsoft do have a team of highly qualified and skilled engineers who focus on Windows Defender, I would trust an independent security company to protect me if I required full protection capabilities provided in most traditional security solution suites. Compared to a company that focus on a wide-variety of things, even if they have dedicated teams for each individual area. Speaking of Emsisoft, it appears they pretty much focus entirely on bloat-free protection, therefore putting all of their resources into both Home and Business protection, and not on several other things. I suspect that their team engineers do not change too frequently, compared to a large corporation like Microsoft that must have people coming and going on a regular basis for whichever reason.
This is opinion and not fact just to be clear. Everything expressed in this post is my personal view. Nevertheless, I am a fan of Windows Defender and have been for a long time when they heavily improved their situation with Windows 8, Windows 8.1 and Windows 10. I might seem like a fan-boy, however I haven't used Emsisoft as a main solution for myself in years from now, and I probably won't in the coming future either (simply because Windows Defender combined with built-in Windows security mechanisms and an ad-blocker is good enough for my liking).
Hopefully that runs smoother with you.