Here's a few synergy stats for ya!
Okafor vs Horford
Okafor--0.81 PPP against / 0.88 PPP for / +0.07 overall
Horford--0.84 PPP against / 0.99 PPP for / +0.15 overall
Anderson vs Garnett
Anderson--0.90 PPP against / 1.01 PPP for / + 0.11 overall
Garnett--0.76 PPP against / 0.95 PPP for / + 0.19 overall
Not saying my guys are better (obviously not), but I don't see a huge difference, at least in the advanced stats, or enough to tilt the balance of power.