<p>If you want acceptance rates, EA's is lower than RD's... however you stand a chance of getting deferred then accepted (which is in fact what happened to me).</p>
<p>Overall, I think the acceptance rate of the EA pool is slightly higher than the RD pool (factoring in accepted deferees), but I believe that the reason for this is the more competitive early round, as students who apply early usually have strong enough applications to do so.</p>
<p>Apply early anyway, it doesn't hurt, it's nonbinding, and best of all you could find out earlier!</p>