No, chad's is more difficult imo.
Do not use ochem part of chads video unless you really need to cover all (too much reactions) PCAT ochem is very general like nomenclatures and stuffs
I watched chads chem and ochem twice but i feel like i didnt need to watch ochem. Dr collins covers all.
Genchem is very good, but it is still too much but i still recommend watching genchem part.