It’s difficult to compete with a team, it’s not just because they are 5 people that it will took the same amount of time multiplied by 5 for only one person.
Probably some people within the team are better in some areas than others.
Say you have someone that spend a great deal of it’s time learning camera , framing, lighting,
Someone else doing animation for some years,
An expert in shading , rendering , FX
A modeling nerd
A pro texture artist
It’s hard to compete in all these fields, at least it will take you much more time if you want to be as equally talented in all these areas.
Unreal is much faster than Eevee, but eevee can be very good, here are two people doing very cool things with it :
Emiliano Colantoni : https://www.youtube.com/user/milkmano/featured
Danied Bystedt : https://www.youtube.com/watch?v=raaAf4M1BEo
Render time doesn’t mean quality, you can get really good results with a realtime renderer and Eevee can output very cool images in 5/10s per frame with a very good quality.
The two guys I posted kind of prove the opposite of what I was saying in the beginning, but they propably do 3D since a very long time and have a really strong artistic background, their work has a more limited scope than what I saw from the website you posted.
If a shot is well done, then there is a perception of more detail than there is in reality, or things can look more complex than they are in the software. Half the work in 3D is cheating, but it’s really hard to master correctly.
Hope that helps a bit, it’s really hard to answer questions like “how comes that their work is so much better ?” with something simple. It’s definitely not a software that will make a real difference.
But of course , good software in the hand of a bunch of good artists will do wonders !