Until you do it one shall never know.
It's like medicine for most it helps while for others it wouldn't make any difference.
It also depends on how you use the phone and apps used.
That's why you will always get mixed reviews.
Generally you hear the bad ones as that's when most people come on this forums for.
Those who are happy will rarely post as its a given that any update should give you better performance.
Best of luck with whatever you decide.
Follow Me, like my posts and Mark as Solution if I helped solve your Problems.