Which is the better one?
What is the difference between a woolen carpet and a nylon carpet?
Which if more lasting?
Which is cheaper?

These are some of the questions that you face while buying a carpet. Here are some of the facts that will help you to make a educated decision.

Lets consider some of the important features and advantages and dis-advantages of both:

# Wool is a natural product, that comes from sheep, while nylon is a man-made product.
# Woolen carpets have been used over the ages, while nylon is comparatively a recent product.
# Nylon carpets are available in a more variety of colors and designs.
# In nylon carpets the fibre loss is less
# Stains are easily removable in the nylon one.
# Nylon carpets are cheaper than woolen carpets
# Most of the manufacturers give stain warranties for a nylon carpet, but, only a few give warranties on wool carpets.
# Nylon ones are more durable than the woolen ones.

Most of the above points indicate that a nylon carpet is better, but, one must consider that
a wool carpet gives a much better appearance.

An ideal solution will be to buy a wool blend carpet with maximum wool and some nylon, in about 80:20 ratio.