The S-300 is no joke. It is significantly faster and has much longer range than the Patriot, and is also anti-missile and has some capability against stealth.
It is probably the best SAM in the world.
The two missile families use different technologies and have different purposes. The comparisons published by the Russians and disseminated by their proxies are irrelevant.
Soviet propaganda methods haven’t appreciably changed, though. It works much like the following.
https://youtu.be/q2DJB3iGh0I?t=1m6s