I've owned a ketch and sailed aboard an Offshore
41 yawl. The yawl points higher because it has a similar rig to a sloop
with high aspect marconi main and jib
. The yawls small mizzen helps balance without over compensating with the rudder and it provides an aft mast
on which to launch a mizzen staysail providing many more sail options than a sloop.
The ketch has smaller main and jib
and makes up for that by a larger mizzen. Small easily handed sails
for smaller number of crew and single
handing. It can carry a larger mizzen staysail.
For windward peformance the yawl outdoes the ketch and for ease of sail handling the ketch outdoes the yawl. Both are fun.