[yakz]

The booster did the job and was recovered.

[namirez]

True but on the way down, two out of 15 Raptors didn't fire. And of course the Raptor on the Starship failed too.

[decimalenough]

They could still recover and catch the booster precisely because they had that redundancy.

For Starship, the spinning out of control was caused by four (!) out of 6 engines shutting off prematurely, from which they clearly could not recover.