I have one of each. My Saiga is a Krebs AK103K conversion, my WASR 10, just an early SAR1 look alike. Price wise, they are opposite ends of the spectrum, function and shooting wise, they shoot and work pretty much the same.
If you want something spiffy, the converted Saigas (the professionally done guns, not the home made guns) are pretty nice. If your just looking for a shooter, the WASR's will do the same thing as the higher priced guns, and youll get to accessorize and shoot it more with the money you save.