McIntosh MA6500 vs. MA6900

These 2 Integrateds seem very close. Both are rated at 200-wpc into 4-ohms, which is also the nominal impedance of my Wilson Cub II Speakers. Is the MA6900 w/Autoformer & 5-Band Equalizer worth $1,000-more? Will there be a noticable sonic difference between the 2 through my Wilsons?