I use ColorFabb nowadays and have to print PLA at 185C and 40mm/s for some parts to prevent clogs into the bowden tube, resulting in zero extrusion.
I think like Gr5 said, it is due to the retraction (depending on shape of the part) making the plastic to soft above the hot end. So i try to print at low temp. ColorFabb seems to get more soften at lower temp than Ultimaker filament.
Altough i am convinced i never had clogging in the bowden the first couple of years, i need to accept the new situation :(
I already replaced the hotend and bowden a couple of times.
Maybe it is because i print larger parts than before...
I might shop for Ultimaker filament once again. Just to taste the difference!