When it comes to choosing the right chairs for your party the choices may not seem as straight forward as one might think. Besides the price difference its important take your guest into confederation. Will there be children at the party and will they get into the folding chairs? If the answer is yes then consider plastic chairs.
The reason for that is because if a chair folds on a child they could get hurt and they are less likely to injure themselves on on a plastic chair.
Metal chairs have an advantage as they are very stern and can typically hold more weight and can also be more conformable for the elderly.
To recap when choosing chairs always consider the type of party and the guest that will most likely be present.