Catch Push or Pull?

I'm designing a printed stringer that uses a sled rather than direct string contact, and I'm trying to decide on whether the trigger should pull or push on the catch mech to release. In a direct contact stringer, the catch mech just pushes the string directly upward, so this is all new to me.

The sled is already pushing forward against the catch, so a pulling trigger would press the catch harder into the sled and pull it back further before releasing. A pushing trigger would instead move in the same direction as the string tension, temporarily reducing the load on the catch before releasing.

Is there a significant difference between these two methods? Should I just use a pivoting catch instead? Bear in mind that stringer springloads can get a lot, lot heavier than springers if desired, so I'm thinking in terms of what will be best for these printed parts as they produce constant lateral friction against each other.