Just thought that if you have been alternating A & B full-body routines up to now you could do one each day. You might feel a bit stiff and sore for the Sunday w/o but it would still be OK to train.
The split might be superior if you are quite well conditioned to training – ie. you've been training for a few years – and need to get more volume in in the 'here and now' to cause a PS response, but both should work if you do a similar amount of volume with each.