Dickerson is not the full time Reds CF. He has not stayed healthy. His offense is primarily against righty hitters. I think his defense is good in CF, but the Reds seem more interested in Dickerson for corner positions.
Stubbs is the Reds CF for now and the future, perhaps splitting time with Dickerson or someone else next year.
Keep Dickerson as your primary CF next year, trade away Stubbs, and you'll be seeing backups out there a great deal. Guys like Willy Taveras. Or maybe Nix. Heisey, maybe, if he does better at AAA next season and deserves a promotion.