Today I made a print 24x30 cm. developed in Ilford ID62 1+3, Durst 670 Color diffused light enlarger, 75 Magenta filtering, Ilford Multigrade FB Classic Matt paper. Extended tonal scale and barely visible and pleasant grain. Very good result. ( For me ).
I spoke directly to Ilford some time ago about something similar involving differing development times for the film printed inside the box of the film and that quoted on the inside of the box of ID11. There response was to always refer to the times printed on their website and ignore the times in boxes with other Ilford material. (Nice to know)
The reason being when they have the boxes printed, they print thousands upon thousands at a time and occasionally development times do change before that run of boxes has been used up. That makes sense to me, so I always use the website figures.