How does the use of Lewis acid catalysts create different products in Friedel Crafts alkylation versus acylation?

In alkylation, the catalyst forms alkyl radicals, while in acylation, it forms acylium ions, leading to different functional groups on benzene.

In both reactions, the catalyst serves as a solvent, determining the product's reactivity.

In alkylation, the catalyst determines the reaction rate, while in acylation, it influences product stability.

In alkylation, the catalyst stabilizes carbocations, while in acylation, it aids in forming acylium ions, resulting in different substituents on benzene.