effect of using a Shortened URL upon website branding

We have a website with 2 URLs the name of website is like betteroffers but because it is very long we bought 2 urls like betteroffers.com and betterO.com, which redirects to the first. (The addresses are just examples and our website URL has 16 letters!) So I want to know how a user feels when using a shortened link like betterO.com, which redirects to betterOffers.com and I want to know how a user experience when is going to a website with very long url (16 letters). At last do you suggest we use a complete, long url or a short and meaningless url? Why?