Looping punching worked fine for Roy Jones JR bro.
Roy has much better hand speed than Chuck. Roy can also bob and weave, something you won't be doing for long in mma, because someone will clinch, and you will lose your front teeth via a knee. Chuck is a good example of a specialist. He is great at avoiding the takedown, cuts good angles with his footwork and has hella power. This fighting style, of which he is the best proponent, plays right into the hands of a strong, athletic, striking based fighter who can takedown and GNP. Sounds familiar?