Thanks! I managed to get the two lines confused, not sure how, and it is too late to edit; just posted a correction:
The place where RC consistently excels is the "no random pauses" - most GCs will occasionally need to stop the world, even when they can mostly do incremental collections. Note that this does not mean they are slower - it is just that the overhead tends to be concentrated in bursts instead of uniformly spread out as in RC.
The place where GC consistently excels is reference loops, and less dependence on implementation robustness.
The place where RC consistently excels is the "no random pauses" - most GCs will occasionally need to stop the world, even when they can mostly do incremental collections. Note that this does not mean they are slower - it is just that the overhead tends to be concentrated in bursts instead of uniformly spread out as in RC.
The place where GC consistently excels is reference loops, and less dependence on implementation robustness.