So, it's time to summarize. Phangan gets 5 points out of 5. What are the criteria? Nature has been preserved in its original form, there are tall rainforests, dozens of waterfalls, not possible to visit all of them... The roads are good and almost empty, except for towns, of course. Traffic jams are not seen. Even a pensioner can drive a moped. Of course there are mountains, but not as steep as on Koh Chang. Quiet, no crowds of tourists like on Samui. Prices are also lower on average. And also the flavour of Thai life is still preserved - wooden houses on legs. We have not seen them on Samui. Taxi drivers are more accommodating. All these criteria are of course selected on the basis of short-term vacation, a week or two. If you go for wintering, as some people do, it may be boring on Phangan. Samui for this purpose may be better suited. But for the short holiday Samui gets 3 and a half points. Too noisy, crowded and commercialized. Although the two islands are not very different in size, apparently the presence of the airport on Samui makes a huge difference (crowds of western tourists arrive by air).