Hi St John Dude,
We stayed at both these resorts about three years ago, 3 days at each one. They are both great resorts and i woud actually recommend doing it that way. But if we had to pick one to go back to it would be Anse Chastenet.
Before we went, I had the impression too that Ladera was a more posh resort and that we would enjoy it more. The truth is neither resort is posh, but upscale caribbean casual.
We like Anse Chastenet better for many reasons. The beach is heaven. There is a section of the beach for the resort guests and another section for visitors, and when I say the beach is heaven, I mean the private section. Palm trees, palapas and wonderful service, it really is intoxicating. As noted above, you have to drive 10-15 from Ladera to get to the beach.
We found the food better at Anse Chastenet. They had a spectacular BBQ/ Beach dinner all lit with tiki torches that was very romantic and delicious.
I think both resorts are about the same distance from Soufriere, guessing 15 minutes. Again the Anse had the more lush and tropical view. Ladera's veiw is more austere. Beautiful, but distant. We had a great veiw of the Pitons from our octagonal room at Anse.
Anymore specific questions, just ask.
Daffy