I cannot speak for anyone else's M61W, but I will say that the one I own - which is supposed to be 3000K - is much closer to 4000K than it is to 3000K...more like 3999.99K. I am wholly disappointed in that dropin because I was thinking it would be close to incan like my XP-G2 HCRI2 dropin is.
I sure hope hope that this 219C is as advertised - 3000K. I've switched to that LED because I've never seen the XP-G3. The originally quoted XP-G2 would have, for me, ideal.
Given my M61W dropin experience, I now understand the disappointment in a customer's sigh when I tell them their "300's" car payment is really $398.79...