For stills offline renderers provide better results with ease. I personally think it’s harder to get that same result in Unreal but achievable.
However, Unreal is the future…it’s hard to learn but from what I can see it can do anything.
I’m learning to use it for Virtual Production, I produce all of my projects in C4d/Octane and I still use that software but whilst I can I’m trying to jump ship as quick as I can. So much to catch up on!