No, SMG was the same. For 100% you needed 242.
Unless this is 241 for Mario only, in which case with Luigi you would need 482(!) stars.
Luigi was just the exact same stars so effectively it's just 120 stars I think Miyamoto here is hinting at 240 individual stars much like when he said 95% new content he didn't mean anything from the old game would return apart from Mario. They've had over 3 years of development and they've already have a working game engine throughout that time so it's not a hard feat for them to design 240 levels in that time as the's less to develop, we don't even know if Luigi is in the game or playable for that matter.