Going from 55-200 to 55-300… Much point?

hey guys!

I currently own a D5100 and a standard 18-55 with a Nikon 55-200 lens ( http://www.amazon.co.uk/Nikon-55-200MM-F4-5-6G-Black/dp/B0009HN57Y/ref=sr_1_2?ie=UTF8&qid=1404574683&sr=8-2&keywords=55-200mm+nikon )
I was just wondering is there much point in selling my 55-200 and buying a Nikon 55-300mm ( http://www.amazon.co.uk/Nikon-AF-S-NIKKOR-55-300mm-4-5-5-6G/dp/B003ZSHNCC/ref=sr_1_1?ie=UTF8&qid=1404574741&sr=8-1&keywords=55-300mm+nikon) or an equivalent 55-300mm lens?
I have heard that it's not worth the money going from a 200 to a 300 as you only get a little closer and it's is so minor. The only time it is worth it is if you're upgrading the lens considerably. Looking at the above two lens would it be worth it? Is what i've been told true?

I normally shoot scenic photos and Wildlife.
Added (1). P.s sorry for typos. I am typing on a tablet.

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