TIP33C brand substitute

Both are serious, very competent manufacturers, so TIP3C sourced from any of them must be VERY good.

Same process? .... who knows? You´d need a spy at the Factory.
Who cares anyway? ... I am certain both meet all TIP33C requirements and then some.

Use tham with confidence, and if it is very very very important for you, grab a handful and test them yourself.

Any "Forum answer" will certainly 100% match ghose *you* have, given to standard manufacturing tolerances.

Which again will be very tight coming from both Companies.