They are very different designs, the old CST723 and CST724 Promanade had a shallow washdown bowl with some splash. Base on similar models, the Map gram rating should be something between 550 and 650.
Personal experience tells me that the Dalton with 2" flush valve and siphon jet at 650 grams works much better.
The New Promenade CST423 / CST424, Drake, and other G-Max and Power-Gravity designs have deeper bowls and couple a siphon jet with a 3" flush valve. No splash, and better performance.
The new Promenade bowls work very well.
CST423 and CST424
These bowls now come in comfort height, with the 2-1/8" trapway and 3" flush valve.
These would make a very good choice.