A few observations from my learned experience:
STI = Strayer Tripp International, a company that originated in Georgetown, TX and pioneered what is now called the 2011 pistol platform. They manufacture/manufactured a variety of traditional 1911 and 2011 style pistols geared towards the defensive use, duty carry and competition markets. They recently (past couple of years) changed their name to Staccato, and are continuing in that line of business.
Strayer parted ways with STI at some point and formed another company doing the same work with a man named Vought and formed SVI, Strayer-Vought International, solely focusing on building competition (IPSIC/IDPA style) 2011 style handguns, initially based in west Texas, and eschewing duty/carry oriented handguns altogether.
To the best of my knowledge, 2011 magazines all adhere to the same external and internal dimensions, locations for cut outs for magazine release, feed lip and follower geometry, etcetera, so an specific caliber magazine tube that is in spec should function normally in a 2011 handgun of the same caliber. So a Staccato branded magazine will work in Springfield Prodigy or an SVI handgun of the same caliber, and vice versa. The entry of Springfield Armory Prodigy into the 2011 market is good news in that regard, since Springfield's intent is to bring the 2011 to the masses in a more affordable format, which means more magazines in circulation, which means an easing of the stinging sensation in the wallet whenever you purchase magazines for your Staccato or Pit Viper or multi-kilobuck Atlas 2011.
In my experience, the magazines themselves are incredibly robust, and should be rebuildable (swapping springs, followers and baseplates as they wear out) for many tens of thousands of rounds of usage. The thickness of the sheet metal that forms the body of the 2011 tubes is significantly thicker than your typical SIG, CZ, or Beretta magazine.