To answer your question if one is more rare they are practically both the same. They are Burundi. The 2nd male is just older. The 1st may if bred with an equally nice female will definetely make some nice blue fry. They are very common and if you look to resell they may be $50-$80 depending on where you live for an adult. They are Captive bred. They aren't the blue Zaire varients that cost $130+ easy. Either way they both look fantastic very nice trailers!