Honestly you have to listen yourself. A rear ported speaker will have more bass reinforcement when closer to the rear wall. But that said it depends on the speaker. What I mean and I'll use Dynaudio as an example. The S25 and C1 are on the same level. But the S25 has a lot more punch than the C1. Both are rear ported.
Also 'punch' is probably not what you mean. Deeper bass I would think is what you're hearing
Also 'punch' is probably not what you mean. Deeper bass I would think is what you're hearing