I think Sibson was the better talent, on top of being the naturally bigger man, and would stop Hilton in a war.
I'm actually about to rewatch Hilton vs Dewitt right now. I haven't watched it in a good 10 years, but I remember it being an underrated war.
Yeah, Doug Dewitt was tough as nails. Making it impressive that Nigel Benn destroyed him, coming off his win over Hilton. Dewitt had taken Hilton's bombs all night without clincing, yet he was totally incapable of handling Benn's power.