The -22 was rated at 42,000 Lbs thrust, and the latest -524B4 version was rated at 50,000 Lbs thrust. Big difference in power.
What killed the TriStar program was the failure of Lockheed to offer customers alternate engine manufacturers. It's what Douglas and Boeing had learned early on when building their 4 engined DC8s and 707s. Either was available with RR or P&W powerplants.