Not really, think of it this way, if your benching, your starting from the up position, so your first concentrating on not dropping the bar on your chest, then there is the reversal of strength from deceleration of the bar into the push.

When you do Pin Presses, your only focus is pushing from the bottom. there is no deceleration, no reversal, its just straight push. This allows you to focus on that specific part of the bench, and gradually get better at it, until you have the functional strength to put it all together on the flat bench.

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