Yes. You are right, I did not use the same preset.
With "Slower" it is 0.88 fps with the
same processor.
At this point I think using the "Slow" preset is a good compromise between performance and final quality, I don't nthink "Slower" significantly affects the quality.
If I haven't miscalculated, an estimated process difference of about 37h40min between the two presets, is that much time difference worth it?
Example: 2 hours of movie @24fps
0.88fps>55h
2.75fps>17h 45min
