I can deal with the rated speeds. The MBI DL +R (Kodak) discs I have (that are giving me all the problems) are rated at 8x, but I still only burn them at 4x. (I haven't seen MKMs in ages - got a couple in one of the Kodak packs - the red/orange type, not the silver) I'm still waiting for Meritline to get back to me on whether what they have in stock IS the 7260 or if stock has been replaced with the 7280. Hopefully I'll know on Monday.
I like he fact that the 7260 has a 2mb cache, compared to the 1mb on the 7280, but i don't know how much of a difference that makes.
Other than that, the specs themselves are almost exact.
Since the one that was sent to me was bulk, I'll give it a try and see how it burns - THAT is my main concern.