Frame tents are constructed using metal framework for the top. They are great because they can be used on grass or asphalt with no center poles in the tent.  The floor plan can accommodate several designs.  The frame tent requires staking to hold them in place, but in some instances they can be held down using weights.

Frame Tent

Pole Tents

Pole Tents are supported by the center poles and by tension achieved through staking it to the ground.  Although there are center poles, you don't have the frame work and as a result it is completely white underneath with a sleek swoop appearance.  This style of tent must be staked.  Pole tents are for lawn stetups only.