I personally prefer both, Im getting more comfortable with the blender modeling tools like HOPS and BoxCutter but that said as darthviper107 has said, blender still falls behind when you need to get animation into Unreal. Maya / Max just handle the FBX pipeline better at the moment i feel.
That said i like how blender tools are making it easier for people to get into content creation without having to break the bank (Blender / Unreal) but for serious stuff i still think Max/Maya is the way to go *for now/. *The blender for unreal plugin is neat, animation didn’t work for me tho.
Then again learning more than one GCC will never hurt you.