If you're talking primarily of small stone chips and the occasional door ding, the white is probably going to be easier to touch up and not be noticeable. The red will show more of a "shadow" where the chip is touched up. I had both a Plat White tri-coat metallic (2004 Mercury Mountaineer) and a Red Sangria metallic (2010 Lincoln MKZ) and the Mountaineer took much better to stone chip touch-ups. But, the white tri-coat was A LOT more expensive from the paint shop than the Red Sangria ($185 for 1/2 pint white and pearl versus $26 for half pint for the red). The store I got my paint mixed at provided me with these handy little tape cards so I could layer the pearl up to 7 layers, then put it on the OEM panel in good light and pick the number of pearl layers that matched. I painted the rear bumper cover that housed the backup sensors. For my sprayer settings and painting style, 2 coats of white and 3 coats of pearl matched perfectly.
-Rod