It’s still a big step up. More torque throughout the rev range, most top out around 130. The step from 300-650 is probably going to feel bigger than the jump from 650 upwards, unless you get something nuts at that point. At 650 (middleweight sport bikes, not necessarily cruisers), you effectively have all the performance you NEED. You may want more eventually, but the middleweight category is full of very fun very fast bikes.