As for the difference between the two, this should start with the nature and name of sound.
Sound is produced by vibration, and the frequency of vibration determines the size of sound. There is a scale about the vibration frequency, and how many hertz it reaches constitutes the basic sound or inflection in music, such as A=440 Hz, C=26 1.6 Hz, etc. This is the international stadium rule.
Then the F key and G key in the eighth five-year plan depend on the pitch of the tonic 1, that is, the pitch of the opening three-hole sound, when the barrel sound is 5. That is to say, in the G key, the frequency of this sound is consistent with the internationally used G, and F is consistent with F. I see.
What I said upstairs is not quite right. I don't think I understand folk music. Only two keys, F\G, are commonly used in Bawu. You can use the big d key of bass at most. I've seen all the other keys, B-flat, E-flat and even C-flat. To put it bluntly, it is the left door. The cucurbit silk has five commonly used keys: small D, C, B-flat, G, F, bamboo flute, commonly used C, D, E, F, G, A, and B-flat is hardly used.
Moreover, flutes are also F and G. At most, an E, A, C and so on are all fingering changes, instead of using A and C as flutes. There are no flutes in C in the whole world. If it is to be done, it is theoretically more than1.4m in length and more than 35 mm in diameter. This monster can't be played.
If you want to study major and often have accompaniment performances, I suggest you buy both songs and use them. It's not expensive anyway. If only one is needed, it must be F.