Comparing LED color temperatures

So when you look at a data sheet and order a 4500K LED you know what you are getting right? Right? Wrong. With respect to LED bins, tints, and output specs we research a world of absolutes but we live in world of ambiguity. I took the photo below to illustrate the point. The same color temperature in different model LEDs looks different.

LEFT (MCE 6500K & 4500K) / RIGHT (XML 6500K & 4500K)

On the left is the Cree MCE in 6500K and 4500K. On the right is the Cree XML in 6500K and 4500K. I don't care what the data sheet says because the look different and that's all that counts. I don't bring this up to say it's bad in any way, I just mean that we should be aware that these sorts of things are not at all absolute. There are a lot of variables that go into the appearance of LED light. We haven't talked about tint for example. But my point is that you shouldn't expect to different models of LED, with the same specs on paper, to appear the same to your eyes in real life.