OK updated to B7T9 and here are the results.
3 pics, each of CD test data discs, everything burned at 8x.
the top snapshot in each pic is B7P9, the bottom is B7T9.
it appears that B7T9 is much better for the TY T02, but B7P9 is better for my Prodisc-made-Verbatiom MCC003.
so now what? reflash the drive every time i take media from a different spindle ???
i wish i had the time to start learning more about this and diggin through cdfreaks to find lots of threads & scans etc., see which firmware is better and so forth. alas i don't have the time for this.
also, obviously quite a difference in quality between the two Verbatim spindles i got.
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
M.C. Escher - Reptilien