I've found this to not be the case. I even measured the 3 Polo RL button down shirts vs the 4 D&S button down shirts. On average the D&S shirts measured 1" less in the chest.
Sorry for introducing actual data into the discussion!
Which model & which cut? I have a few dozen work shirts from RL and they all very drastically depending on model and cut, even with in a single product like (RLBL, RLPL, RL Polo, Blue Label, ect....) The other factor is "made to tuck: or "made to be un-tucked"
Same works, same workers line @ the plant in China. Now you're just talking to talking, I personally own multiple shirts from this line and they are at least the same grade quality if not better then normal RL Polo shirts. Black Label is a notch up, RRL is also an notch up & Purple label is several, but this is made by the same people on the same machines as every piece of RL Polo that comes out of China.
Gotta agree with Bl@ster...I bought a couple of flannels Winter 12', read the measurements and picked out my sizes according to the size chart..When I receive the items..one was baggy and way too big while the other was too snugged...Returned both items and never will I purchase from that RL line again...
My suggestion spend a little more and get on RRL gear...quality
I've never reached heights more vaunted than Polo, but I consider the Denim & Supply tee I bought to be of comparable quality (not that I rate the quality of Polo particularly highly at all...)
Concession: I only have the tee whereas bl@ster appears to have had the benefit of experience with a wider range of Denim & Supply pieces.