The design of Snell golf balls is comparable to premium brands such as Titleist and TaylorMade but at a much much lower price. Buying used Snell golf balls gives you even deeper price savings without sacrificing performance.
The MTB RED is designed to have higher spin on short irons and approaches. This is the key difference in the models. If you feel you need MORE SPIN with these shots, MTB RED would be a good start.