Briscoe by knockout for sure ... I think it borders on one-sided... Briscoe had trouble with movers but if you traded with him, he'd generally fuck you up
Barkley was a big middleweight so that might prolong it just a bit but once Briscoe finds his range it gets ugly.
Iran Barkely was 22-4 when he beat Thomas Hearns. He was 25-7 six fights later. Old-school ´Bad´ Bennie Briscoe would win this - Barkley is no Monzon or Valdéz - more like Charley ´Bad News´ Austin. Knockout!