Spence was the best EDGE in this draft imo. I liked Bosa, but he can't bend the edge like Spence. I'm not saying he's a god tier prospect, but he is a guy I had a legitimate 1st round grade on (and I didn't have many this year). All I am saying here is Bosa is what he is and that Spence is just scratching the surface imo.
There's a point where value exceeds risk. Jack passed that after pick 25 (honestly it was probably earlier, but Seattle had no reason to pass on him). The concern isn't the short-term. It's the long term. I'll take 4-5 years of Jack over 4-5 years of most guys. If I'm right on K.C., then he isn't going to be here any longer than that anyway just like Upshaw.
I think he is miles behind Spence in pass rushing skill. Correa doesn't have a translatable bull rush. He is about 30lbs underweight unlike Spence. He doesn't bend and wins more with motor than speed. All that translates to an edge setting role for me and thats if he gets bigger which will likely hurt his speed.