Go to
KMC's website and look for yourself. There is no such thing as a "road bike" or "mountain bike" chain, and there is actually very little difference in any bicycle chain except for construction design, and whether they are made of steel or titanium. They are all 1/2"x3/32" or 1/2"x11/128" depending on whether you are looking for a 7/8spd or 9/10/11spd chain (except for the 1/2"x1/8" used for BMX and SS/FGs), and their design differences are based saving weight, adding strength, or marketing.
It you are a clyde, you are using it on a tandem, or if you otherwise need a very strong chain go for one with mushroomed pins, otherwise buy what you can afford. All the rest is BS, but you really need to find another LBS if they sell chains as "road bike" or "mountain bike" chains.....