Different styles. Lyle was able to capatilize on Foreman's wide punches. Louis' straight, short punches would get there sooner and take out Lyle within 3 or 4 rounds.
Yes, he could. Lyle didn't stop anyone worth noting outside of glass chinned Shavers. He was heavy handed, but also very limited. Louis would have little problem landing on him. Lyle could score a flash knockdown, but that would be all.