It's a huge compliment to Jersey imo. Out of all the heavyweights who have ever boxed, I struggle to name more than 50 who are greater than him. Doesn't get more complimentational than that (I even made a word up for him)
They have a different type if skill set. Walcott was great on the move, the counter, and had his body movement feints. Lopez was a textbook power puncher with great patience.