Two ground breakers - or at elast as close as we can get...
The bottom one is a Spencer mk2 Cherub, which is probably as close as we can get to the first Cherub, arguably the most influential dinghy built since the war...
The top one is Infidel/Ragtime, John Spencer's ground shattering keelboat, which is arguably the most influential keel boat built since the war...
One is twelve feet long, one is 65 feet long with an extended transom, but they're not hugely different!