1. Snaffle vs. Curb: There is NO SUCH THING as a snaffle with shanks. Full stop. ANY bit that uses leverage is a curb. A snaffle is a bit that exerts 1:1 pressure, I.e. 1lb of pressure on the rein, 1lb pressure on the mouth. A curb bit is any bit that increases the ratio any higher than 1:1, I.e. 1lb pressure on the rein, 2lb pressure on the mouth. Both curbs and snaffles can have mullen, jointed, double jointed, ported, rubber, sweet iron mouthpieces. One or the other does not denote what class the bit falls into.
2. Albino Horses: They don't exist! Horses that look white are either grey or dilute (i.e. Perlino, Cremello, etc). Albinism is presented with lack of ANY pigment. This means pink skin, white hair/nails and red eyes. Always. The lack of any of these means the animal is not a true albino.