I agree Todd.
It can be very hard to distinguish between Cali and Oregon. For a long time I thought mine was an Oregon and I fragged it to many people not knowing the difference. After all it was a solid "blue" without any green. Until one day back in 2012 a dear friend gave me a true Oregon. The difference is night and day when they are side by side. Also for me the growth rate is MUCH slower on the Oregon vs the Cali.
See if you can tell the difference. The Oregon is on the lower right, and the back is all Cali. Other than the Hawkins Enchinata.
This is a Cali Tort
Now I've also learned that if you aren't getting the deep blue color from your Oregon then it could be linked to a lack of NO3 in the tank. A couple of years ago I upgraded my system and for a time I wasn't getting the colors that I once had. My clam was sucking the life out of my new system, by removing all detectable levels of NO3. So I started dosing PNO3, and within days the colors were back. But like everything in this hobby causality is always at play but that will lead to a whole other story.
Before adding NO3
After: