From reading up, it seems that Iberostar will be more convenient to many of the dive sites. How much extra boat time would staying at the Westin add?
Other than that, I was wondering if anyone has thoughts on Pros/Cons that I am not thinking of. Any advice is appreciated.
A few things to think about:
Since it's been mentioned, if a "fast" boat left from the Westin, it could get you to the dive sites in the south in ~ 30-40 minutes, but not as fast as a "slower boat" from the Iberostar dock. I dove with Pepe Scuba at the Coral Princess (about a mile south of the Westin) and their fast boats can move as we got the the dive sites in ~25-35 minutes depending on where we went. From the Iberostar, it's only 5-10 minutes. Some enjoy the longer boat rides, but
if the weather isn't great or the water is somewhat choppy, the longer boat ride might not be so enjoyable.
Also
leaving from the north, there is a good chance a dive op will either be making stops to pick more divers up or let divers off, adding more time to your overall boat time.
Pro Dive has a satellite shop at the Westin. When I stayed at the Melia, Pro Dive had a shop there also and they provided taxi money for the ~25 minute ride to (and back) the Allegro/Occidental where their boat left from. Only 5-10 minute boat ride to dive sites. Less boat time but time on the road. Dressel Divers is located at the Iberostar. You may have to book initial dives online, but it is very convenient.
Clearly, not all dive ops pick up at the Westin, but there are some good ones that do.
If Salty Endeavors picks up at the Westin, they get good reviews from SB members. If Pepe Scuba picks up from there, I would also recommend them. I've researched over 30 dive ops in Cozumel (I'll attach the link) and most will only pick up in town and/or south of where their boat leaves from. Salty Endeavors generally leaves from Puerto Abrigo - a marina just under 2 miles south from the Westin. I would research any op that picks up from the Westin and make sure they are diving the marine park and not some small reef north of town.
Assuming you want a dive op to pick you up at the dock of the resort you stay at, you will have more dive op choices if staying at the Iberostar.
Lastly, the beaches in the south (Iberostar) are nice and sandy with the pretty Caribbean blue water - the beaches in the north are not as nice as they can be iron shore, less sandy, and have murky water due to the currents.
For me, I'm all about convenience and also prefer nicer beaches, the Iberostar would get the nod over the Westin.
Below is the link to many dive ops in Cozumel. Pretty current info although I probably need to update it some.
Dive ops by jonhall