Can't be sure from the pic, but does resemble both my Sleeks (18' and 20') as far as the deck. The seating, the way the tarp is laying on the far left looks like wrap around seating which would more resemble Gil's boat! (a 19' Kauai). The deck looks like mine though. 1 a full stringer, 1 not.
I dunno for sure, but if it's 19', could be like my 20' and take some research and patience to know what it is really.
I'd be curious to know if it's full stringer or not. I would add though, that I've never seen a Sleek full stringer (16-20') with a floor in it, but I am new at this whole thing.
Ray