big vs. small
Pros: besides more space for living and storage on the larger boat, they usually sail a bit faster (longer waterline) and will feel more comfortable in a seaway. It can carry more water and fuel, which means it may have a greater range.
The cons for a larger boat are: more costly to dock/moor, may require more maintenance, bigger sails may require more effort to raise and lower them, a bigger engine may be louder and use more fuel, a taller mast may restrict passages under fixed bridges, a deeper draft may limit where it can go.
~ Happy sails to you ~ _/) ~