I think, in a 15 rounder, Ken finishes strong to seal a close decision, unanimous. He does enough to offset Ron's power.
For comparison's sake, some common opponents: Jack O'Halloran: Lyle - KO 4; Norton - W 10 Larry Middleton: Lyle - KO 3, W 10 (UD); Norton - TKO 10 Jose Luis Garcia: Lyle - KO 3; Norton - KO by 8, KO 5 Jerry Quarry: Lyle - L 12; Norton TKO 5 Boone Kirkman: Lyle - TKO 8; Norton TKO 7 Jimmy Young: Lyle - L 10, L 12; Norton W 15 Muhammad Ali: Lyle - TKO by 11; Norton W 12, L 12, L 15 Earnie Shavers: Lyle - TKO 6; Norton KO by 1 George Foreman: Lyle - KO by 5; Norton TKO by 2 Scott LeDoux: Lyle W 10; Norton D 10 Gerry C00ney: Lyle KO by 1; Norton KO by 1 It doesn't really reveal much beyond the fact that they were both top-flight heavys in their day. I'd bet on Norton, but I wouldn't bet much.