Yes, the rest will allow you to further gains mainly for 2 reasons:
1. The body has began producing it's own testosterone again and the introduction of an exogeneous anabolic will shock the body. Very similar to changing patterns in training style.
2. You will no doubt have lost some of the gains post-cycle and the body will again be ready for another stage of growth. Remember, the body can only grow so quickly. It must adapt to it's weight, which of course takes time.
You see, the body never actually adapts to the testosterone. It simply needs time to adapt to the mass that has been added. And then of course it will be ready to grow again.
Another key point is that even if you do allow the rest period between the two cycles, you will not gain nearly as much the second time around (this is considering the exact same cycle is used both times).
This is again, due to the fact that the body has grown and requires a larger amount of anabolics to continue the growth.
Excellent and valid questions SK. I appreciate the discussion.
Many of you 'young bucks' are very intelligent as far as using anabolics. I am quite impressed.