Yours is not a cob and is exactly the same as the other guys except yours has 2 of these "cobs". It even says on the label of the pic you posted that yours is 2x 66 3w diodes, which is not a cob, at least nothing like the "Muricah" cobs people are building themselves or buying pre-built.
Look if you're happy with your light great! My point was only to make it clear to ALL that this is not anything like the "Muricah" cree or bridgelux builds or pre-builts and people shouldn't take these results as a way to judge what those lights are capable of.
And for the record my screen is fine, never had a problem seeing a pure white light from any cree or bridgelux cob light shown on here or any other sight. Just because the light you have is not a pure blurple, doesn't mean that it doesn't have at least some of those spectrum specific diodes in it, which those "high dollar" "rich people" lights do NOT have.