The scales are close enough where it isn't noticeable. I have mixed 1/32 cars and aircraft with 1/35 figures and armor often and they come out looking fine. You can also mix 1/32 and 1/35 figures together. The key is to keep constant sized items (canteens, rifles, ammo pouches, etc.) in the same scale. People come in different sizes, but not gear.
A couple examples.
1/32 VW with 1/35 figs and armor.
1/32 Land Cruiser w/1/35 armor and figs
(Sorry for the crappy pics, they were with an old digicam)
Gino P. Quintiliani - Field Artillery - The KING of BATTLE!!!
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