What is the difference between part numbers CAB-VGA-DVI-AUD25=, and CAB-VGA-DVI-AUD=?To me it looks like they are both VGA-M w/3.5mm stereo male to DVI-M w/RCAx2 male cables. The "-25=" version is 25 feet long, the other is 6m (a bit under 20 feet)....