Not alot the USB you can plug a USB stick in to to save movies to and is easier to flash as you can use USB to flash.
also the box pvr has a twin tuner which allows you to record one channel whilst watching another which the starview 4 does not
Hi The Starview Box Twin tuner PVR was able to take a hard drive inside and record from either tuner, sadly not available new anywhere as it has stopped production. The Starview 4 is a single tuner and records to an external USB device, drive or stick. jbvid
Think the box pvr has stopped being made and a lot of bugs were reported in it. I find the usb one a lot easier to use as you can just record to usb stick then take it anywhere with you and watch it i.e on a pc or laptop!!
You will find what you require at the link below. http://www.4shared.com/dir/3042613/f6e3421c/sharing.html