# The main difference between using AlCl3 and FeCl3 in Friedel-Crafts alkylation

What is the main difference between using $$\ce{AlCl3}$$ and $$\ce{FeCl3}$$ in Friedel-Crafts alkylation?

Is that $$\ce{FeCl3}$$ disfavors carbocation rearrangement in Friedel-Crafts alkylation?