Very nice Seb. The cool/warm dichotomy is perfect with the 50/50 composition. I keep flopping back and forth comparing things and enjoying details on both sides. The blue/gold complementary pair makes it especially strong. I'll bet it's a real eye grabber when printed larger.
This image gave me a little vertigo at first until I figured out what it was. Great shot, it's so rare that I see an image that makes me wonder like that at first. Along the lines of WB, if you shot it RAW you could almost hang prints side by side with the WB for one set for the left half and the other set for the right half.
You'd have the color that you have in your shot posted for the one on the right (so yellow on the far right) and blue on the left side of the left shot by hanging the other print on the left.