Studied them both for a little while and it looks like cam and induction (the Tunnel Ram with Dual Demon 750's vs. the Single 850 DP)...Looks like the Ford probably does quite well under 3000rpm and comes into the 3500rpm range that they begin the dyno graph at a bit higher than the Mopar. If you sacrificed a little bottom end off the Ford you could probably get a lot more on top. They built the Mopar for upper end:
"Although a long-stroke engine often evokes images of a lazy, low-rpm torque brute, we planned on building ours for big torque and ample top-end horsepower."
The Ford looks like it was built to be a more "all around" motor.