Hi, I'll be in Port Stanley for 9 hours on Feb 5 as part of a cruise. I'm very interested to see some of the penguins. There are two tours on offer, one to Bluff Cove and one to Sparrow Cove, both of about the same duration (3 hrs. approx.) Is there a real difference between these two coves and if so, which one would you suggest to go to? Thanks