Hey Deputy, don't get too torqued high and to the right! I stated that the designs were awful close that's all, not exact. Close only counts in horseshoes and hand grenades! The UR use what looks like some kind of a straight walled brass pistol case as the carrier for the large rifle primer. The 10ML uses a tapered nosed steel percussion module to carry the 209 shotgun primer. The UR must use a breech plug with a center "nipple" that fits inside the brass casing with an outer wall for sealing. The 10ML uses a true chamber and uses the mating of the taper on the nose of the percussion module and the interior taper of the chamber to create the seal. Both use a duel forward locking lug on the bolt for locking of the action. This provides an extremely strong lock up. UR uses Howa actions and I have built many custom built centerfire rifles and smokeless muzzleloaders on Howa actions as well.
In looking at the UR breech plug design further, it most resembles the discontinued Knight Disc Elite. As far as the lawyers go, I have no need for one, as it appears I don't have a dog in this fight. It appears if there is a fight it may be between UR and Knight. On the UR website it states "since 2001" that they have been in the muzzleloading business. if they have been in the muzzleloading business since 1990, so be it.
As far as whether the UR is as good as or better than the Savage 10ML-II or vise versa, it remains to be seen and is open to debate. If the performance claimed on the UR website is true, it is in the same league as the Savage. But, I have not seen those velocities published anywhere expect the UR website. You have not listed any loads, velocities, or energies. That is why I am skeptical. Not calling anyone anything, not even trying to imply it, so please don't take it that way, but until I see the info I am not sold on it. On the other hand I have thousands of loads combinations chronographed in the Savage's and my custom builts. And Toby Bridges has at least 5x as many as I have. No, not to my knowledge has Toby shot the UR. Yes, he was offered to shot the UR about a year or so ago, but he had to travel to them and it was just to shoot some rounds across the chorongraph. He would not be able to experiment with his own loads. That came straight from Toby. Maybe if they send him one for a while and let him really ring it out, then he may or may not change his opinion on the UR.
UR also states that they have tested their muzzleloader to over 125,000 PSI. By who, how, and where? Savage tested the 10ML and the 10ML-II in their R&D indoor range, using computerized electonic strain gaging equipment. Toby Bridges was there when they loaded a triple charge, three charges of 30 grians each for a total of 90 grains, of Alliant Red Dot powder, then rammed three saboted 300gr Hornady .452 XTP home on top of that triple charge. Pressures spiked at over 156, 000 PSI, yet the 10ML sustained only a bent recoil lug and a .008" bulge in the barrel. Savage removed that barrel and recoil lug, installed a new recoil lug and barrel and that particular 10ML is still shooting today. The 10ML-II was tested simularly, and pressures reached 126, 000 PSI, but the primer blew allowing the gases to blow by and reduce the pressure. I am sure in my mind that the URm using the same lock up system (bolt with locking lugs) could easily withstand 125,000 PSI, but some testing confirmation would be reassuring.