The big difference is the SN95P has a PCIe 16x and 1x slot.
The other one has AGP and regular pci slot.
Personal The lack a regular PCI slot is the killer for me. Also you can't get AIW in pcie.
I like to be able to use my older systems for HTPC, and this system is just not up to par for me.
IF you looking to price savings think aboit get a Aria case and Micro ATX mother board.
New has the ATI 200express board for urder 100 and the Aria case is on sale for $50 ( mail in rebates needed). They make a pretty good combo.