Yes being a union member has resulted in me getting class leading terms and conditions, as said there might be a clue why the job your are going to is at the better end.
Of course the non union members get the same pay increases and improvements union members do, though they often turn out to be the ones gobbing off about the pay increase not good enough etc etc 
, personally i couldn’t really accept other people’s union contributions and activity at meetings resulting in me getting the ££ results of their efforts if i didn’t do my share, but it takes all sorts.
My subs are about £13 a month to Unite, worth every penny, pay rise every year.