The core trade-off
Live transfer compresses the whole value exchange into one call: the consumer is qualified and handed over while still engaged, so the buyer sees quality immediately and pays accordingly. Lead campaigns move the contact burden to the buyer, who then absorbs the drop-off between your call and theirs. That drop-off is exactly what the payout difference reflects.
Operational differences
Transfers require your agents to be working when the buyer's team is available, reliable telephony, and clean handover technique. Leads let you work outside the buyer's hours and remove transfer failure as a risk, but shift the burden onto data accuracy — phone validity, consent evidence and duplicate control become the things that get you rejected.
Where rejections come from in each
Transfer rejections cluster around qualification failures and dropped calls, most of which are disputable from a recording. Lead rejections cluster around unreachable consumers, inaccurate records and duplicates, which are harder to dispute because the evidence sits with the buyer's later attempt rather than your call.
Which suits your center
If your strength is agent skill and you can staff to a buyer's hours, transfer campaigns pay better for that capability. If your strength is volume and data hygiene, or you operate outside the buyer's window, lead campaigns fit better. Many established centers run both, using leads to keep agents productive outside transfer hours.