I'm shopping for contractors to replace a wooden fence.

There are two types of fence contractors: one specializes in building fence,
the other is a general contractor. The fence contractor usually hire a lot
of cheap laborors, use the quickest way to fastern the fence together (nail
guns).

The general contractors usually claim they do higher quality work and
charges more (perhaps 50% more) than the fence contractor.

How do you decide which is the better deal in the long run?