Although Moto G4 plus is best phone in its class, it has some problems in 2gb ram varient version.
In 2gb ram varient which comes with 16 gb rom is bit laggy when u use above 75% of its storage and when u play high end graphics games like gta, gangstar vegas, six-guns its performence is quite satisfactory.
Whereas in 3gb ram varient which comes with 32 gb internal storage, their are very few portion of above described problems.
So I would recomend Moto G4 plus 3gb ram varrient.