I can comment on the Beast 16, the Beast 14 (heel only), and Radical 1.0.
The rear holes of the Beast 16 heelpiece are the same as the Radicals. The front holes on the Beast 16 heelpiece are further forward, and a little further apart. The mount points can overlap if you mount the heelpiece of the Beast 16 rearward, and the heelpiece of the Radical 1.0 forward.
The Beast 16 toepiece rear holes line up with the Radical 1.0 toepiece rear holes. The mount point is almost identical - the Beast 16 is a few mm forward. The middle toeholes of the Beast 16 MAY conflict with the forward toe holes of the Radical 1.0. They're going to be real close together. Inserts may or may not work - hard to say for sure.
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