Yep you are probably right, the Specialized Roubaix Zertz are almost identical:
There is supposed to be some special kind of compound inside a hole in the frame to damp any vibrations. Looked some reviews if it's a hoax or not and found only mixed answers. Some think it's really helping others say it's only for marketing. Probably bit of both.
I like the CS-041 also a lot, I dislike how the seat-stays in 256 meet into 1 piece, from some posts here I got an impression it's a weak spot. Was looking for some short chain-stay frames initially but all only fit chainrings up to 36T. This though should fit 1x11 with 38T and has nice XC geo also. Will be probably pricier also but dunno about that, should ask Peter about the price.