Why don't you have a test drive of the new one, you will then be able to make up your mind. For what it's worth, if your car is behaving and reliable, I think I would stick with it, at least until it's three years old.
Don' forget, the largest depreciation is within the first few years of ownership, so there is no financial benefit in changing the car at two years old. If you don't like it, then that's a different matter. It's a head and heart thing at the end of the day.