It's correct to note that ball type and ball surface help in
part to determining the rate of ball revolutions of a shot. But
first, a quick definition:
Roll is the motion of a ball when the axis of
rotation is mostly horizontal. (i.e., the ball is revolving like a
wheel / end-over-end)
All balls tend to achieve this state near the pin deck, before
contact with the pins.
Spin is the motion of the ball when the axis of
rotation is mostly vertical.
(i.e., ball is revolving like a DVD in the player / sideways)
Spinners aside, this type of revolution is frequently seen from
when the ball is released, until around mid-lane when the ball
loses its sidewards momentum and assumes more of a roll toward the
pin deck. 
Ball revs, on the other hand, is a different thing altogether. Its
just a measure of how many full revolutions is achieved within 60
feet.
Ball surface / type (side weight, top weight, core, RG, et cetera)
all influence when a ball enters, exits, or re-enters either a
state of spin, roll, or a combination of the two.
Even different balls thrown by the same bowler can have different
rev rates depending on what that bowler is trying to achieve with
the shot. Therefore most experienced bowlers do not really take rev
rate to heart. Its just a measure that some people like for its
"bragging rights".
Like Enginboi has pointed out, a lot of bowlers actually give up
some revs for control. Because revs does not win you any games.
Consistency does.
Oh, he's right - its not easy to crank. Don't do it just for the
"show".
So kids, don't try it at your neighbourhood bowling alley without
proper training. 