In all honesty there's not much to distinguish visit's to some of Thailand's hot springs from each other. Sometimes well signposted, sometimes not at all. They are all are designated to 'wow' the visitors, attract more tourists and line the pockets of local entrepreneurs and governments. That's the theory. In reality very low costing improvements have been put through, often resulting in nothing really enhancing. Or money has been thrown into sterilizing the surroundings resulting in high maintenance costs with no corresponding budgets.
Arguably it are those that develop organically that contain the most charm.