Arsenal boss Arsene Wenger has generally preferred record signing Lacazette in the Premier League this season and has been rewarded with five goals in nine Premier League appearances for the former Lyon striker, reports the London Evening Standard.
"Giroud, Lacazette -- it's a never-ending debate. I think both of them are very good players," Wenger told SFR Sport.
"For me there's no difference, and each time it's very hard to decide who starts."
Sunday's win at Goodison Park was the first time Wenger has fielded the 'big three' of Lacazette, Mesut Ozil and Alexis Sanchez, injury having kept the latter two out of the side at times this season.
"There are still things to improve, but we created a lot of chances through our team movement, and if you add [Aaron] Ramsey with his penetrating runs, we caused Everton a lot of problems," he said.
"After that, it's easier for everyone to express themselves. I'm satisfied with the way we played. Our movement was good, and the quality of our passing was good.
"We were tested mentally because we were losing 1-0. We got back into the game, and we finished the match in a very convincing way."