Trabrew,
I can't speak directly for the Primal, but I have owned two Super Ds. The Super D is what Howard would have eventually morphed the Hill style into IMHO. It is NOT a R/D bow, as it has NO deflex in it, only reflex in the outer third of the limbs. It is whisper quiet, not a speed demon but no slouch, and it does have a pulse on the shot, but much gentler compared to your average Hill. It is a super narrow riser and limb bow, rapier like, with tiny tips. In the 40# range when I held one for the first time I almost thought it felt like a kids bow it was so darn slender and light. The grip is not too small, it is somewhat rounded, and just enough to get a nice full grip, but it is not the deep oval/wedge of your average Hill. The bow is exceedingly easy to shoot, very smooth, the 66 and 68 are extremely so. It's just a fun damn bow either way, but a true R/D will give you a little extra performance and a little less pulse, again the D isn't bad less than a Hill but you do know you've shot it.
For a true R/D that strings up in a nice crescent/D my first choice would be a Mohawk Sparrowhawk, such a sweet shooting bow and a real longbows longbow. The NM Superior or Baraga are also excellent, as is the Dwyer original.