The size of a truncated backup of an XL4 or a TP is about the same size. The size of the core partitions and gui data in the MFS partitions is about the same across the whole S4 series. The XL4 has a slightly different partition size of the bootstrap partition but that's about it. We don't have info on a TP4 partition layout (so if anybody would like to post it, thanks in advance) but the truncated backup image would be the same. Have tested this on a TP, XL, and an XL4 sofar. Also tested it on an S3 OLED and an S1. The backups are fatter than WinMFS but that is because the method is different.