The pics didn't turn out half as good as I had hoped so I only posted the one side by side comparison of the nose for reference, but this was from just before, along with some details of the two against each other.
8.6 x 32.56 with 14.75 wb - straight through the rail, longer tail and ever so slightly more rounded / pointy in the kicks
8.75 x 32.75 with 14.62 wb - tapering from 8.75 at the front down to 8.6 at the back, broader longer nose and slightly shorter stubbier tail than the 8.62
I have skated a number of the 8.75 white eagles and they always felt really stable, decent boards. The one 8.6 I did set up and skate was also really good, but being a little longer (actually a touch longer than the white eagles) it reminded me of the 8.38 when compared to the usual 8.5 boards, which for me was just a little more nimble along with being a big longer in the wheelbase. Skated both with Indy 159 standards, 56 to 58 classic full wheels.
EDIT: purple is 8.6 and blue is 8.75 just in case the pics are too blurry to see