Which is why comparing them by goals might be puerile. It reduces the contributions to just goals output and ignores everything else. Benzema is the antitheses of a goal-poacher. His all-around play, the runs he makes that open up space for teammates, his hold-up play are all better than most strikers'. Lewandowski is a tremendous goalscorer (better than Benzema and maybe better than anyone on the planet), but Benzema offers certain things that Lewandowski does not.
And i think that's why - if their goal output is close - you have to give the edge to Benzema.
Benzema came out on top this weekend for sure, but he doesn't allways shine the the Madrid-derby or the classico:
His record against Barca and Atleti aren't all that either:
El Classico: 12 goals and 10 assists in 42 games (14W, 10D and 18L) - 0,29 G/game and 0,52 G+A/game
Atletico: 7 goals and 4 assists in 37 games (17W, 11D and 9L) - 0,19G/game and 0,30 G+A/game
Total 19 goals in 79 in the big league games isn't good enough to be considered among the best in the world though.
4 goals in 9 games in the knockouts of the CL is not a trivial number.
Real Madrid conceded 5 and 4 goals in the Ajax and City ties. It's hard to solve that on your own.
Chelsea were champions of Europe. Hardly a weak team.
Benzema was the best player for Real Madrid in that tie and the only reason they had a chance (that and Chelsea's lack of aim).
If you're considered against the very best strikers in the world it is a trivial number.
Real Madrid losing to Ajax was an upset, Real Madrid losing to that Chelsea team was an upset and they were clear favourites in both those ties.
Lewa in CL KO's
30 goals and 12 assists in 44 games. 0,68 G/game and 0,95 G+A/game
Haaland in CL KOs (for a much weaker team)
6 goals and 2 assists in 6 games. 1,00 G/game and 1,33 G+A/game
Kane in CL KO's (for a similarly weak team)
2 goals and 0 assists in 5 games, 0,4 G/game and 0,4 G+A/game
Mbappe in CL KO's
15 goals and 3 assists in 22 games, 0,68 G/game and 0,82 G+A/game
I could bring in the numbers of Messi and Ronaldo as well, but they are on their way down, so I won't.
20 goals/6assists in 56 games (0,36 G/game and 0,46 G+A/game) was Benzema's record in 15 seasons of KO rounds in the CL before last season is good numbers, but it that isn't up there with the very very best. He hasn't consistantly been posting big enough numbers to be in this discussion except for 1 season in his long career.
One fantastic season doesn't make you the best striker in the world, even if you were the best that season. Would you consider him the best striker in the world based on this season so far? Of course you wouldn't. I rate Lewa, Haaland and Mbappe above him above him as a striker, as they are all consistantly delivering these insane numbers, and Kane around his level.
And again, I really think Benzema is a fantastic striker and player, just not the very best.