Tackleberry,
I'm a fan and user of the RCBS so take that into consideration against my comments. I consider the increased number of collets available from RCBS to be a positive thing as it makes getting a good match between the bullet and collet. From a design point there are two weaknesses in the Hornady, a company I usually hold in high regard. The cam handle has had a history of breakage which I suspect could be helped by polishing any manufacturing marks on the cam surfaces and applying a little grease, much as with the Lee hand priming tool. The other is with the design of the collets which have a much more complex shape than the RCBS. The more complex shape results in springiness in larger calibers and even breaking in the .45 caliber collets.
RCBS collets have straight, constant thickness walls and operate like an R-8 or MT5 collet which are solid steel with parallel inside and outside walls. I can't imaging one of them flexing outside of their normal operating design or breaking. The Hornady is easily more convenient to use with the camming lever as opposed to the RCBS screw type tightening handle. I've been using a hammer type puller since the '80s and the RCBS for over 10 years. I far prefer the RCBS over the inertia hammer (also RCBS) but it is not useful for most handgun bullets, jacketed or cast because it needs a straight sidewall to grasp.
IMO the design and durablilty of the RCBS will serve longer and more reliably than the Hornady or I would have purchased the Hornady because the cam lock is appealing.
Just this week I had to pull the bullets out of over 30 .22-250 rounds because the Sharpie markings on the cases did not match any of my reloading notes and used the RCBS puller. It was effortless. There was no doubt which powder was in the cartridges; just the amount. It turned out all of the cartridges had the same powder charge. I had previously run a ladder test with the same brass and later neck sized rather than full length sized the brass so it also did not go through the polisher to remove the old markings. Between the collet puller and an RCBS Chargemaster it was a pretty fast and easy job to verify the loads.
I've rambled enough so will bail for now.
David