Better creator, better technique, makes everyone around him better, scores similar figures and is rarely injured, still close to peak physicality, unlike Suarez, not that his game relies on the physicality, all technique and vision based.
Plus the main criticism for Benzema is choking sometimes/not being the alpha scorer, and Suarez has that as much if not more past 2 years, rarely ever scores in CL (Benzema is 4th best scorer there) and has dissapeared in majority bigger games past 2 years. Defenitely doesn't have the legs anymore as he used to impose himself on games.
Would easily take Benzema over him, more so because he would he playing with Ronaldo again, and he in general can get everyone around him clicking seamlessly. Even when he is not scoring he is giving high level impact.