Bevo I can't answer that either but I will say this...With those little differences on the chart is may be more about what brand pipe is installed as opposed to style. And either way anyone riding the bike would never notice 1 hp difference. I do see the point in your question and interested to see if you get a explanation for it.
2006 V-Star 1100 Classic
Silverado windshield and passing lamps
OE Highway bar with custom mounting brackets
Kuryakyn Dually ISO Highways pegs
Barons Nasty Boy Slip-ons
Kuryakyn led headlight halo