Hey Ian
The diffrence has mainly been "ghosting" issues in 720P and 1080i/P, better colour sepratio and less dropouts sound wise.

Technicaly speaking I found that the Bettercables has the best
1. VP (Velocity of propagation)
Gives u a % of the speed of light.
-Number should be as high as possible
2. Capacitance stated as pF/m
- Should be as low as possible

40th.Anv.DSP8000SE &861v8/ID41,Meridian Ultra Dac,C15 Black w/SSD,QNAP TS-669Pro 6X3 Tb w/Core,HD621,Oppo UDP-203 ,JVC DLA-X700R, 2xJL Audio F112v2, Marantz 8802A for Atmos with KEF Reference 5 and 4C withR700 sides & rears and 4xKEF R50 Atmos