Yes, and there's an interesting reason why that I don't think anyone else has pointed out. Almost all systems have a downward curve to their effectiveness. The more blocks you use, the less effective each block gets. Power (generation and capacity, but capacity actually does just get stronker with more blocks) is sort of an exception to this, but it's also somewhat the easiest way to show this, as once you pass the soft cap power efficiency tanks. The same number of blocks spread out across multiple ships will yeild greater total system strength than on one ship.