Solved

Different stars

<a href="https://ibb.co/Jd1J7tq"><img src="https://i.ibb.co/X4QRsLD/Screenshot-20190509-193341-i-GP-Manager.jpg" alt="Screenshot-20190509-193341-i-GP-Manager" border="0"></a><br /><a target='_blank' href='https://poetandpoem.com/swimming'>swimming poems by famous poets</a><br />
this is my driver.
And this one i just bought.
<a href="https://ibb.co/7vS2JzW"><img src="https://i.ibb.co/mJR6CBq/Screenshot-20190509-193333-i-GP-Manager.jpg" alt="Screenshot-20190509-193333-i-GP-Manager" border="0"></a><br /><a target='_blank' href='https://poetandpoem.com/swimming'>swimming poems by famous poets</a><br />
Why santa is 4.5 stars and other is 5 stars?

Hi Gytis. I think it is related to the Hidden Stats on the drivers. If you look at my 2 drivers for instance, one is rated at lvl19, other lvl20...exactly the same stats though! :D

What Hidden attributes, not sure (wasn't playing when those were visable) And higher rating doesn't always mean stronger driver..my lvl19 rated driver is exactly the same, and sometimes even much better on certain circuits!