Take both lights outside, and check out dirt, rocks, trees, flowers, and wildlife. The warm tint will most likely look MUCH better, give better depth perception, and better contrast. The pictures available in various posts on the subject give some idea of this, but seeing it for real the difference is HUGE.
Ive compared 2 pretty much identical lights, eagletac P10A2's, one cool, one warm, in an outdoor test.
The cool tended to make everything a bit gray, harder to distinguish details. Also, colors tended to be way off. Red flowers were purple, yellow flowers were very pale. There was very little difference between the colors of rock, dirt, twigs, and dead leaves. Everything was a bit washed out looking.
The warm tint was much better at color. Red flowers were red, yellow flowers were yellow. Much better contrast between rocks, twigs, dirt, and dead leaves.