Best Currect Production 845 Tubes

What are the best current production 845 tubes available that adhere to original RCA specs, especially those suitable for use in Cary 805AE or 211FE amplifiers? (KR tubes are off spec and cannot be safely used in many 845 amps without modification.)

What are comparable differences in sound and build quality between Shuguang 845B and newer version Psvane 845 TII tubes?

What ever they are called the vast Majority of them com from Shuguang.
KR are the best I ave heard.