Thanks Pancelticpiper for these words 
About the questiosn:
1.- Traditional Asturian Bagipes only had ONE drone. So if you want to play in an “authentic” mode, you will use only one drone. Another question is the pressure: Asturian Chanters uses more pressure and are a little hard for play, so you will need a HARD drone reed for get an stable sound without variations.
You can put an Asturian Chanter in your Galician Bagpipe set, in fact I do the same, but the reason for this is that I haven´t money for buy a complete asturian set. But there is a very important thing: ASTURIAN DRONES and GALICIAN DRONES don´t have the same sound.
Asturian Drones says: AAAAAAAAAAAAAAAAAHH
Galician Drones says: OOOOOOOOOOOOOOOOHH
2.- What Bagpipe it´s best? This is a very subjetive questions. If you want chromatic potential and second octave, and this is your main proposit, then you need to play Uilleann Pipes, Northumbrian Smallpipes or maybe Musette de Cour.
Galician and Asturian Bagpipes are instruments joined to an historic tradition. They are “rural instruments” in their essence, so you will play very well TRADITIONAL MUSIC with them.
Galician Bagpipes can play two octaves, but it´s not easy. Also Asturian Bagpipes. I see two players that can do this. Always with perfect instruments made by the best makers. But the question is: WHAT IS THE REASON FOR GET A SECOND OCTAVE? Galician Music don´t use the second octave, only a few notes, but the major part of their songs only use the first octave. Asturian Music uses more notes of the second octave, but not always, so…What is the reason for need a second octave? Irish music needs a second octave, but Galician and Asturian music only needs a few notes in some songs.
Today, the possibilities of both bagpipes are exactly the same. The main difference is the fingering. What fingering do you like more? Galician Bagpipes usually plays with open fingering, but in the past, they were in closed fingering system, different from the asturian close fingering system.
Finally, I think that the best thing that you can do for decide what bagpipe it´s best FOR YOU is listen a lot of music, and think which is more attractive to your particular taste. Then, select a bagpipe an try to do this with it. But if you are thinking in musical possibilities, both bagpipes can do the same.