Good point. That difference probably makes for a subjectively “better” (more entertaining) plot in which we get to watch Data adapt to the chip and learn from it. Android’s chip is arguably a more realistic scenario, being that it is effectively a software upgrade that takes effect immediately. But that plot point in and of itself is less of a story to be told onscreen, and acts moreso as exposition toward the actual plot of exploring the benefits of those human mannerisms that had been immediately mastered.