Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Is there a significant difference between the salt mill and pepper mill mechanisms?
Document: However, the glass looks great and when treated with respect will last indefinitely.There is another point worth mentioning....Although the salt and pepper mills look identical, they are NOT!! If you intend to grind salt, get the one designed for salt. Reason..?? Just this. The internals, the actual grinder mechanisms, are distinctly different.
The salt mill is superior to the pepper mill, but you still can't go wrong with the pair. 5*!!! !
This s the best salt & pepper mill I've found. Good construction, Easy to use and lovely enough for the dinner table.
I wanted a high quality salt mill and this is perfect! Fills easily, grinds nicely, perfect with the pepper mill.
I bought the salt mill and pepper mill set, and I really like the way they look. But they're larger than I expected, and they really looked kind of silly on my kitchen table, so I returned them.
I already had the matching pepper mill (which I also love) and have been looking for a salt mill that is enclosed to keep out the high Memphis humidity. This one is sleek looking and has a cap that does the trick on keeping the salt dry.
Got this to go with the Bavaria pepper mill. You can adjust the coarseness of the salt with a little knob in the top. Unlike most mills, this one sits on the table with the grinding part UP. This keeps loose particles from ending up on the table when you're through grinding.
Note:The salt mill and the pepper mill are not the same. The salt mill has some sort of ceramic-looking grinder and does not grind as fine as the pepper mill (which is chrome). I like my salt and pepper powder fine, so I just bought two pepper mills and filled one with kosher salt.
I love using sea salt, but hated the fact that I couldn't control the texture with the inexpensive disposable salt mills. This Salt Mill is not only substantial (but not huge) and beautiful, but is easy to adjust to the fineness or coarseness you want. I liked it enough that I bought the matching pepper mill.
Absolutely love this salt mill! Finally, someone realized what a mess mills that deposit from the bottom make and designed one that releases from the top... with a cover! Plan to get the Bavaria Pepper Mill once my current one (that leaves pepper bits everywhere it lands) dies. Attractive and functional design.
Answer: Yes. The salt is made from non-corrosive materials and pepper is made from metal.