Lithium-ion battery lifetimes are based on charge-discharge cycles.
The Prius battery is far smaller (about 5-10x smaller) than a Tesla battery, so it is cycling charge / discharge far more often.
So you'd expect the same quality battery to last 5-10x less miles in a Prius than a Tesla driving the same distance. It's likely that Tesla's investment in battery quality and active temperature controls mean the Tesla battery is also treated better and higher quality.
Topping that battery up with a generator in the Prius complicates things, both reducing kWh used per mile (some from generator) but also allowing a discharge - recharge cycle to occur multiple times in the same trip.
The Prius battery is far smaller (about 5-10x smaller) than a Tesla battery, so it is cycling charge / discharge far more often.
So you'd expect the same quality battery to last 5-10x less miles in a Prius than a Tesla driving the same distance. It's likely that Tesla's investment in battery quality and active temperature controls mean the Tesla battery is also treated better and higher quality.
Topping that battery up with a generator in the Prius complicates things, both reducing kWh used per mile (some from generator) but also allowing a discharge - recharge cycle to occur multiple times in the same trip.