I measured the heating-time of both Hotends and the winner is our new british friend: the v4 from E3D. If you look at the table you almost feel sorry for the GRRF-modular Hotend while the v4 seems to like it hot.
each square = 10° x 10s
Starting @ 20°C
Stopped @ 240°C
E3D v4: 120sek
GRRF modular: 350sek
shure it doesn’t say anything about printing-quality, but when i look at that GRRF-curve i doubt that it makes 270°C in a non-ridiculous amount of time… and i think they might have made it for PLA-only or 24V.
For this test i just startet my RAMPS1.4 with Marlin rc3 and standard PID. I don’t know how to adjust my PID so you can see it on the Table near 240°C.