Can you share your opinion, between the Omega Planet Ocean GMT and the Aqua Terra GMT, which would be a better watch for someone who doesn't swim? In terms of built excellence, overall design for wearability and costs.
The two watches that you listed above are true GMt watches with independent adjustable 12h hand while the 24h hand (GMT hand) is pegged to the minute and seconds hand.
Both are GMT watches but what sets them apart is that the PO GMT allows you to keep track time in a 3rd timezone while you are travelling. Also, with the 24 clicks bi-directional bezel on the PO, you can track a 2nd timezone while you are at home.
For example, you are in malaysia. It is now 4:37pm. Both the 12h hand and 24h hand points to 4 and 16 respectively. However, you can track time in California by just rotating the bezel to point the GMT hand at the 2am marking on the bezel. You now can track time in USA while in Malaysia.
Another example, you are instead visiting Melbourne, Australia now. You can pull out the crown to the 2nd position to unhinge the 12h hand and move it forward 2 hours. So, now, the time shown is 6:37pm (which is local Melbourne time) while the GMT hand is still on home time (GMT hand pointing to 16 which is 4pm). So, let's say, you need to call London at 3pm (London/UTC time), you just simply adjust the bezel so that the GMT hand points at 8 on the bezel. So, London now is 8am. You will now know when to call London which is when the GMT hand points to 15.
The AT GMT only allows you to track home time and local time as it doesn't feature a bi-directional bezel with 24 hour markings.
For me, the PO GMT is a lot more versatile as a GMT watch while the AT GMT is just a basic traveller's watch.
Planet Ocean GMT is a nice watch that does everything that it do very well. It's a fantastic watch to take for a swim with its 600m WR but it does wear a bit big and thick.
The Aqua Terra is a versatile watch that can be worn as a boardroom watch and also on holiday at the beach with a pair of sandals. It is widely agreed upon that the AT is a Dressy Sports watch.
The PO will just look weird on a shirt with cuff links.
So, in the end, you have to choose whether if having a full fledge GMT function (ala GMT Masters II) is more important than having a versatile watch for all occasions.