Ally

Thank you all so much for your replies! You’ve all said basically what I needed to hear! I really appreciate it! Can’t wait to let you know after booking. ? 

Thank you all so much for your replies! You’ve all said basically what I needed to hear! I really appreciate it! Can’t wait to let you know after booking. ? 

I have sailed Navigator and Harmony.  I loved them both.  I prefer the Oasis class, but I did not feel like 7 days was near enough to experience the Oasis class.  For 4 days, you may enjoy Navigator's size more.  If you like it, Oasis would be a great family ship-you can bring the kids along for 7 days later.

@Ally For a 4 day trip I would go with Navigator. If it was a 7 day trip I would say Oasis.

yeah the only problem with this is we did the Allure and then Indy. 
Indy was nice but we really liked the Oasis class, and that is why my next 2 are on The Oasis of the Seas!

Have done Navigator and all Oasis class ships. We both like the bigger ones for everything to do on-board. My wife also liked Navigator for the ports we went to. Like @WAAAYTOOO and @Lovetocruise2002 have said, it's about what you're looking for. 

I'd definitely lean towards Oasis.

If it's your first Royal cruise, I would pick Oasis hands down.  It offers way more than Navigator in terms of dining, entertainment and overall venues.  We are not big beach people, so Coco Cay doesn't really appeal to us that much.  I suppose if you were big on beaches, that might sway you.  

I agree with Way too.   Enjoy the sea days on the Oasis plus I love Cozumel.

Hey, Ally -  I will always choose Oasis but that’s just me.  1 port of call and 3 sea days (counting day 1 as a sea day) sounds like heaven to me but some people prefer more ports.  I think you would find that the extra sea days give you more opportunity to explore the ship, which is really the best part of cruising on a Oasis.  Nothing wrong with NAV !  I just prefer the big ships.