The specs of them ?
The white one witch is oppened is a pentium II 350 MHz (0ver clocked @420MHz) with 256Mbyte RAM , 10Gbyte + 20Gbyte hard drives 4x CD-R scsi 50pin graver ,.,
The grey one is a celeron 433MHz, 192Mbyte ram and 160Gbyte HDD (The original one was 8Gbyte but it died like 3 year ago
The one witch have not an tower is a pentium II 266 MHz but it runs @200 because the bios battery connector is broken '.' it have 128Mbyte and the hard drive is an 400Mbyte one but only 100Mbyte works (I think you saw why, it is opened from 3 years ago (and counting...) but its works okey on this part)