just sold one at spaceship, the chat window is live and the deal closed in under 5 minutes. the chat window at saw is not live, you have to refresh the screen or revisit the chat.
emails for chat updates at spaceship are instantaneous. at saw the emails can take 5-10 minutes for additional chat messages.
saw has direct links to domains sawsells/domain/name.com but spaceship does not, so for unpointed domains saw works better while pointed domains work better at spaceship.