0 Rating Systems -- Amazon vs Goodreads

Having now been a published author for two months, I've noticed something for the first time that I hadn't noticed before on two sites that I have used for many years. Amazon and Goodreads both use a five-star system for customers to give ratings to books (or other items in Amazon's case), but the levels are different. And this is really depressing for me!

If someone wants to rate a book as 'it was okay', on Amazon it gets three stars while on Goodreads only two. If you want to rate a book as 'I liked it', it's four stars on Amazon and only three on Goodreads. Thus on average books get a whole star less on Goodreads than on Amazon. This may seem petty, but it honestly gets a tad bit depressing to keep seeing three star reviews on Goodreads when you only get better ratings on Amazon. Considering that Amazon owns Goodreads now, I wish they would align their rating systems to make them consistent!