Well, it's about performance vs cooling. If you need it to stay cool, stay with the G75. The Lenovo has heat problems, as in literally too hot to touch. Invest in a cooling pad, as well as keyboard + mouse. However, there's still the fact if you're getting the SLI version of the Y510p, there is a boost to performance. I'd only recommend the upgrade if your games are playing on a low framerate or you want to play on higher settings.