You might also try asking at the link below.

Here is a link that might be useful: Home Decorating Forum

You can really go either way. It might be worth it to hire a decorator for a few hours to help you make a good choice. Perhaps your local retailer has someone in the store that can help. It is easier to pick the same fabric on the sofa and chair and most people do this. Really you can't go wrong either way.

I don't know the fabric sofa and chair be of the same fabric or complementary fabric to each other but. I think its excellent choice of fabric sofa and fabric chair if you Enhance the space between the sofa and chairs with coordinating decor items and textiles. Place a large, plush rug on hardwood or tile floors. Decorate a coffee table with items such as a candy dish or a vase filled with flowers that matches the chair's fabric.