The FP
Lavezzi 40 brochure claims 540sf of internal space. The
Lavezzi is a 40 footer but it 'feels' no larger than the
Lagoon 380. And a quick look seems to confirm the Lavezzi has more
hull fore & aft of the bridgedeck. Not as optimal for
interior space but perhaps a little more seakindly - its all a compromise!
Personally though, I think space measurements can be misleading. Smaller & cleverly designed is preferable to larger & badly designed. "Form follows function" and all that. The only way to really evaluate the space is to step aboard.
Cheers