going on the published info yes there were changes to LOA and Beam in the newer versions
possibly due to the 10% rule in regards to splashes and copyrights and Donzi took a splash of a splash
the SkiSporter 16'7 1/2" LOA 7' Beam
http://www.lgdonziclassic.com/pdfs/skisportlit.pdf
The sweet 16 16'8" LOA 6' 10" Beam the brochure says classic but it is the sweet 16 pictured this is before they made the 2+2 classic
http://www.lgdonziclassic.com/pdfs/sweet16.pdf
The 16 Classic 16' 5" LOA 6' 11" Beam
http://www.lgdonziclassic.com/pdfs/16classic.pdf