I concur, recently tried the new Norton vs the good old Eagle and the latter still finished better and kept on cutting longer.
Oh and BTW, talked to a guy that told me to use the Orange assilex disc 1500 instead of the yellow 778-1500 and that it works better that way, less time to a pigtail free finish. Haven't gotten around to test it out yet and I only have two of the orange discs so I'm waiting for a black paintjob to test.