Personally, I dont like coralife products. Out of those 2 fixtures I would go with the Tek. Is there a reason you are going with a 4 lamp? I would go with a 6 lamp or 8 lamp. You will find that with a 6 lamp you will be able to fine tune the color better than a 4 lamp. For an extra $65 you can go from the 4 lamp to the 6 lamp Tek.
If it was my tank, I would go with
http://www.conceptaquatics.ca/index....ixture-18.html
OR
http://www.conceptaquatics.ca/index....e-black-4.html