DDoS solution comparison

Hello everyone,

I was recently tasked with meeting with and comparing 3 separate DDoS solutions. I have met with them with my manager. Now I need to compare the companies. However, I am in a junior role. This is my first interaction with DDoS.

My question for you guys is, What do you think are key objectives to compare to all three companies? If you can just point me in the right direction I think I can take it from there.

Thank again!