Out of interest, I'm currently shooting Jessops Pan 400SX and putting it through Xtol in various dilutions, at the times indicated by the massive dev chart for Agfa APX400, compensating for temperature, and getting good results.
As a guide, the chart for Xtol indicates:
APX 400 in Xtol diluted 1+2 (400ISO) at 20° is 12min
In reality, this week I did:
APX 400 in Xtol diluted 1+2 (400ISO) at 25° for 7min30sec
and
APX 400 in Xtol diluted 1+2 (400ISO) at 22° for 9min45sec
Whereas by comparison, for DD-X, the chart lists:
APX 400 in Ilfotec DD-X diluted 1+4 (400ISO) at 20° is also 12min, similar to my starting point for Xtol 1+2.