I assume you have correctly identified both of these cartridges as the SR type 7.7.
My guess is these are both Type 92 tracers.
Ken Elks states in his book, the Type 89 ball was made from gilding metal, the AP was made of brass, and the incendiary Type 92 was made of cupronickel. Neither bullet above is the Type 89 explosive Ma 101.
Both cartridges #1 and #2 are cupronickel bullets, which would mean if it were a Type 89, both would have a magenta case mouth seal. Both cartridges have a green case mouth seal. Therefore, green case mouth seal and green primer are not associated with the Type 89 in any way.
Elks also states the Type 92 used the same case as the Type 89. Therefore, dimensionally there should be no significant differences between the two.
The Type 92 semi-rimmed was developed in 1932 and the Type 99 rimless was developed in 1937. Type 99 ammunition could be fired in Type 92 weapons without malfunction, but the reverse wasn’t true.
Elks noted that cartridges from opened packages of Type 92 from 1938 onward all had green or blue-green primers lacquered primers. The green lacquered primer was used to tell the difference between Type 92 and Type 99 ammunition and occurs on several varieties of Type 92 loadings including ball, AP, etc.
My interpretation is cartridge #1 is a pre-1938 Type 92 tracer. It has a clear lacquer primer which would be appropriate for the 1932 to 1938 era before the advent of the Type 99. The bullet is cupronickel which is correct for Type 92 tracer, and the green case mouth seal wasn’t used for Type 89 ammunition, but was used for the Type 92, Type 97, and Type 99.
Cartridge #2 is a post-1938 Type 92 as it has the green lacquered primer to distinguish it from the rimless Type 99. It has a cupronickel bullet and a green case mouth seal, which would indicate a tracer.
Have said all of the above, the Japanese did create an odd and confusing system for ammunition identification. After examining several pieces of Japanese small arms ammunition, I sometimes wonder if they could even follow their own system.
I hope the above information is correct and helps answer your question.