The 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 you are a bit more experienced in disc golf or perhaps already have a Leopard in your bag, the Leopard3 will be a great addition.
The 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 distance in their throws. If 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.