Oh..sorry ka... I mean the food which I have tried in Chiang Mai are not spicy at all, all very soupy.. :) Maybe you have tried the food from Yun Nan, the type of food is spicy then..the bacon sold in SG Mcdonalds are made of chicken coz it is also a halal fast food lor.. just like in Malaysia...:)
As for Mae Hong Son, I have also stayed about 2-3 days there in my recent trip. But I prefer Mae Salong, another mountainous town in the north, near to the border of China, where most of them can speak Mandarin with me...make me feel at home too ..:)