Seed or cuttings for my late summer plantings?

I've been watching a thread on this forum about suggested varieties to withstand the heat of summer in the south. Many good recommendations were made and I have most of them growing this year. It is my intent to replace some determinates and a few indeterminates which don't perform well, with large seedlings of the supposedly heat tolerant varieties.

I am now trying to decide if it is better to plant large seedlings grown from seed or large plants grown from cuttings for the late summer/ early fall garden. The cuttings require less effort with a reduced probability of failure since they will already be hardened off. They also require no more investment of seed.

Which has been better for you, seed or cuttings?

Ted