In most quality systems those parts are equivalent (they meet spec). If you need or want better parts, you tighten the spec.
A sibling comment to yours points out that TSMC has better processes. That's probably a better way to state it, they can hit a tighter spec at the same price point.
> In most quality systems those parts are equivalent (they meet spec). If you need or want better parts, you tighten the spec.
Components being equivalent within spec doesn't mean they have the same performance. It only means they are all acceptable for their intended use. That's why the Apple A9 from TSCM were performing better than the Samsung ones in the same way batches of products made from the same blueprints can have widely different failure rates.
These are quality of manufacturing issues and yes it is due to TSCM having better processes than Samsung. That's not a better way to state it. One is the reason of the other.
A sibling comment to yours points out that TSMC has better processes. That's probably a better way to state it, they can hit a tighter spec at the same price point.