My local supermarket sells numerous brands of coconut milk. Some brands, by their packaging and location on the shelf, are marketed for use in Thai cookery; other brands target Indian or Caribbean cuisines. There is a substantial difference in price between the different brands: a factor of ~5 between the most expensive (Thai) and the cheapest (Indian).
Are there any significant geographic variations in what is sold as 'coconut milk', so that I should buy the brand marketed towards the cuisine I want to make? Or can I use whichever one I consider to be most attractively-priced?