John, it seems that the difference between Kodak sepia 1 and Kodak sepia 2 is that the number two is to give you a warmer tone than the sepia 1.
I would imagine that they do this by messing with the amount of addative. To explain, there are variable and non variable sepia toners, Fotospeed make the two kits. The non variable comes in a two bottle kit, a bleach and a toner. The variable comes with an extra bottle, an addative. By adjusting the amount of addative you can adjust the colour of the final print. The more addative, the browner the print.
A good starting point is the non vairiable. Its a darn sight cheaper than the vairiable kit, in the U.K, nearly a third of the price, and it gives a lovely tone.
Myself, and alot of other APUGers, prefer to split tone with selenium, as a totally bleached back and re-developed sepia print can be a bit lacking in clout, as the shadows can look a bit muted.
Stoo
P.S If you like what you get from your toning, home brew is definately the way to go.