APS 226 is mainly used in CECHA's and CECHB's and provides up to 32 amps of load.
The APS 231, if I'm not mistaken, was introduced to the market with the CECHG, which has a lower consumption than the initial ones, and because of that it provides a maximum of 23.5 Amps.
yes, you can use a 231 in an A01, but keep in mind the chance of abrupt shutdowns due to the power supply being less powerful, in addition to that at certain times the power supply will be being forced to its limit.
For example, heavy games like Uncharted 3 running on disk with the fan at 60%, in addition to the control and hd connected to the USB, the source will be at its limit if you don't disarm for safety.