How so? Up until this past year where Horford suddenly developed a 3 point shot they were fairly similar players. Horford is definitely a better scorer than Monroe, especially in the mid range area, but Monroe is a better rebounder in my opinion, and they are about the same in terms of assists.
Dont get me wrong, I think Horford is a good/very good player, but I just dont think hes going to be worth the $20/mil per season some team is going to throw at him. Especially when hes already 30.
Just my opinion though. If the pistons sign him I wont throw a fit, I trust SVG so if he sees a use for him Im good with it.