Assuming pictures are real on both I think they are different boats. Different trampoline color for example. Also the copart one shows damage to the crossbar for the front trampoline. But having two for sale in IA at once is odd.
The 21SC is a “sport cruiser”. There was a place for a big cooler and semi dry storage area in it also. They made a tent that used the boom and wings as supports and covered the main trampoline. The main sail rolls up around the boom, allowing you to reef it to any size while under sail.
So wasn’t designed to be fast. Think island hopping and camping weekends.