If helpful to anyone out there, my wife and I just finished selecting a new roof for our home and we focused our research on GAF Camelot vs. Certainteed Grand Manor.

It seems that most roofing supply firms in my area (northern NJ) recommend the Grand Manor because of the reputation of the shingles (can't go wrong with them given that there is a 2009 consumer reports review that puts them squarely on top) and, as such, I ended up selecting Grand Manor. That said, I liked what I learned about the Camelot product and wish that I would have had more time to research their shingle (one can only put so many hours into a choice).

One item of note is that it takes 7 bundles of Camelot to cover 1 square of roof vs. 5 bundles of Grand Manor to cover 1 square of roof -- indicating to me that you are [or rather may be?] getting a heavier grade shingle with Camelot. That said, what caused me to hesitate with the Camelot product is that their web site shows their shingle with a connected tab across the bottom of the shingle and this is a look that my wife and I didn't want. Interestingly, I did not see this "connected tab" (my choice of words in their samples or in the field and, as such, don't know if it's a design change that is to come or if it's something something for the Camelot II product design (either way, it created uncertainty on my end and hence my Grand Manor choice).

The other item worth note is that the Grand Manor seemed (to me) to have a lot more color variation than the Camelot. We purchased the Grand Manor "Colonial Slate" and it has hints of red and green in it and if we had gone with Camelot, we would have selected "Antique Slate" and it is much more of a grey slate color (no greens, reds, etc.). Similarly, the Grand Manor stonegate and gatehouse colors also have a lot of color variation and that's very evident when you see them in person.

Below are current photos of each product and for anyone doing research, I'd recommend that you inquire further about (i) the connected tab that shows with the GAF Camelot and (2) how many bundles it takes to cover a single square of roof (an indication of the thickness [and durability] of the product).

Certainteed Grand Manor Photo (Colonial Slate - From Certainteed web site as of June 2016):

GAF Camelot Photo (Antique Slate - From GAF web site as of June 2016):