Just be aware that samples boards are often made with the prettiest sections and matching tones, when the reality is a lot more color variations for that model number. It could also be an older sample board and not match the current dye lots.

Your best bet is to order 1 or 2 boxes of the current dye lots and lay them out in your space. If you like it, then order the whole quantity for the job making sure you get the same dye lot. Make sure you order extra material as you will have a hard time getting matching dye lots later on.