A Leopard3 is designed to be a bit faster and less glidey than the classic Leopard. If you are completely new, it would therefore be an advantage to start with a Leopard. If instead you are a little more experienced at disc golf or perhaps already have a Leopard in your bag, the Leopard3 will be a great addition.
Leopard3 is a fairway driver from Innova with a bit of turn. It is good for new players who have already learned some technique, but lack some length in their throws. If it is released with less speed, it has a very straight flight. For experienced players, it is a perfect disc for long, soft turnover throws with great control.