Expiry
A dated future settles on a specific day, so you eventually have to close it or roll into the next contract. A perpetual never expires — there is nothing to roll.
Price anchoring
Dated futures converge to the spot price at expiry. Perpetuals have no expiry to force that, so they stay anchored through a periodic funding payment between longs and shorts instead.
Which to use
Perpetuals suit open-ended directional views you may hold indefinitely. Dated futures suit a thesis tied to a specific time horizon.