Yes.
So if you upgrade your drives from B's to E's, you get double the data on
the tape (10 GB native at 128 tr, 20 GB native at 256 tr.)

If you upgrade your cartridges from J's to K's and write on them with the
3590E's at 256 tr, you get twice as much tape in the cartridges, so it
doubles again, to 40 GB native.

So with compression, you will get over 80 GB on the cartridge.