the difference between branded Digital Photo Frames(Philips) and the generic brands (HUM,Victory,etc.) is easily visible.

few advantages I know about Philips DPF because I have one
1. Larger Resolution sizes as compared to other brands- better picture displays
2. Temporary Internal Battery Packs - allowing viewing for 48 minutes - 60 minutes. (Most DPF needs to be connected to a power supply for opreation)
3. Internal Memory Storage - you could copy pictures from viewing other photographer's SD/MS/CF Memory Card into the DPF if you do not have an OTG harddisk.
4. Programmable On/Off time if you leave it in your office table.
5. Changeable Frames x 4

but its definitely expensive .