It’s always fun to talk about microphones, but the reality is that the room you are using it in, and the context of how you are recording is equally as important as the mic itself. Based on its Amazon page, and the fact that Alan Parsons, in his book, The Art & Science of Sound Recording, has raved about its big brother, the AT-4033, as “a great general-purpose mic. With a higher output level than many other condensers and a slightly enhanced top end response, it’s great for many vocal applications,” the 4020 could be fine for your application.
But are you recording with a full band? Are you building up something track by track yourself, with say, drum loops or a drum machine, individual guitar and bass parts, and then the vocal on top of the layer cake? In either case, It depends on the quality of your room. If the acoustics allow for it, a condenser mic like the AT-4020 and a decent pre-amp will give your voice a bit more high-end. But condenser mics are often akin to the wide angle lens on a camera. Back in 2015, when I wrote a product review on the Reflexion portable vocal booth, I transcribed a quote from David Stewart of Sweetwater, when he interviewed Mitch Gallagher about how he built his product studio in an hour-long YouTube interview:
You don't need a project studio as elaborate as Gallagher's just to record vocals if you're, saying, laying down guitar tracks via something like the Pod or amp modelling software. But when it comes time for vocals, a condenser mic, if not recorded in an acoustically treated room, really needs something like the Reflexion filter or the GIK “PIB” portable isolation booth and a couple of duvets behind it to minimize the room.
If you're not prepared to treat your room to reduce reverb and slap, consider a dynamic cardioid mic. It won't have the same high-end bite, but it's a much more narrow-focused beam and will minimize room nastiness. The "lowly" Shure SM58, or the Shure SM7B Dynamic Vocal Microphone going into a Cloudlifter pre-amp might be much better choices than a condenser if recording in an untreated room.