Yes, DP birds will taste gamier than CX birds. Their meat is darker, chewier and with more texture. Once you get accustomed to eating real chicken..and that is what real chicken is supposed to taste like, make no mistake...you will think store bought chicken is tasteless and texture~less, and though it is tender and juicy, that's about all it has going for it.
This is one reason I like to take CX to an older age than 8 wks..that's a 2 mo. old chick! Barely old enough to even have a taste to the meat. If you can get CX to an older age, their meat gets darker, a little gamier and with more texture~but not as much as a DP bird...and nigh perfect because it retains the tenderness and juiciness of the younger CX bird.