When it comes to Luigi, most people have always seen him as just another version of Mario. Back in the original Mario Bros game in 1983, the two-player mode was introduced for the first time. Luigi was basically a second copy of his older brother Mario.
Though they have some differences in gameplay and color, the two brothers look almost identical, with Luigi able to jump a little higher. Still, Mario is the one everyone remembers as the hero, while Luigi often gets overlooked. But is that really fair? Between Mario and Luigi, who is actually the stronger one?
Comparing Their Strength

Trying to weigh their physical strengths is almost impossible. You could pull examples from various Mario games to guess who’s stronger, but the examples are too many and change depending on the situation. What we can say for sure is that both Luigi and Mario are very strong.
Because of this, the real winner only emerges when one of them powers up to the max. Mario or Luigi reach their peak power when they grab a Fire Flower (not including the star). Both can throw fireballs, so that doesn’t set them apart. This means whoever grabs the Fire Flower first gains the edge. So the key isn’t who dominates immediately but who powers up first.
So who’s the ultimate winner?

Strength alone doesn’t settle who’s better between Mario and Luigi. Let’s look at size. An article on MuayThaiPros.com explains that in a fight, a smaller, more skilled fighter has an advantage over time. The bigger fighter has to win quickly while their size is still a weapon (like knocking out the smaller opponent before they score points).
This gives Luigi an edge over his superstar brother. While they might be evenly matched in raw power, Luigi’s size could help him claim the Question Block prize first. But honestly, Mario and Luigi probably don’t care who’s stronger. These two famous plumber brothers who love mushrooms and adventure have already won the hearts of all their fans, haven’t they?