A:Answer There aren't any other differences between the LG LK610BPUA HDR Smart LED HD 720p TV - 32" Class (31.5" Diag), Model # 32LK610BPUA and Model # 32LK540BPUA other than those that you listed. Pin 18 in an HDMI port carries +5V (50mA) which is minimal and has no impact on the TV's overall power consumption. The Estimated Yearly Electricity Use of 39 kWh for the 32LK610BPUA versus that of 76 kWh for the 32LK540BPUA is more attributable to their designs. Both TVs have a resolution of 1,366 x 768 (i.e. 720p) and a refresh rate of 60 Hz, so they will have the same picture quality...^IFV