Benzema has not played for France since October 2015 – head coach Didier Deschamps refusing to call up the Madrid star, instead turning to Chelsea's Giroud.
Asked about the comparisons with Giroud, Benzema used a motorsport analogy to shoot down the question via social media.
"Don't confuse Formula One with karting, I'm Formula One," the 31-year-old said on Instagram Live, "And I am being nice."
“It works because he is there, that is the only reason. It won’t be spectacular, he won’t do something amazing, but he has his thing.
“Other than that, does anyone like the way he plays? I don’t know.”
Benzema has scored 27 goals in 81 international appearances for France, while Giroud is third on the all-time list with 39 from 97 matches.
Prior to coronavirus postponing the likes of LaLiga, the Premier League and Euro 2020, Benzema had scored 19 goals across all competitions for Zinedine Zidane's Madrid in 2019-20.