Lyle, better fighter, but just happened to be in a much stronger era, better technique (possibly), boxing ability, bigger, stronger and more durable. Johansson may have hit harder by way of 1 punch KO power, but it’s neither here nor there by way of power since they can both switch each other’s lights out anyway.
Lyle scored multiple early knockdowns on George Foreman. I feel safe saying he could hit much harder than Ingo.