Someone made a thread last month about these swords and there was a lack of a good picture of the Khmer one. The Khmer one called Preah Khan Reach and the Thai one being called Phra Saeng Khan Chai Sri.
Anyways, I found a really good picture of the Cambodian sword and wanted to post them here. Now you can see they are different. The shapes are both similar, but the blades are tapered differently.
Preah Khan Reach
Phra Saeng Khan Chai Sri