I'd say Classic KP and Slade are even in strength and KP probably edges Slade out slightly in durability but agile as KP is for his size he's no Deathstroke. In skill they're even more or less but where Deathstroke dominates is in battlefield analysis. Before Fisk's punch can reach the halfway point to Deathstroke's face you can be sure that DS has already calculated the attack's path and thought of three ways to either block or dodge it.
DS 7/10