I can offer this:
According to Columbia, the only difference is that the LE is polished. If that is true, then all assumptions about ball reactions normally follow: more length, more backend, less oil handling ability. What "more" and "less" mean in this situation will depend on the degree of polish and how the original performed for you, if you had one.

Since the Rock On uses Columbia's TEC (or TEC2) particle formulation, if I were you, I'd either make sure I used Doc's Elixir on it or took some other type of special care with this ball's surface,
OR
I'd find the equivalent ball using Columbia's newer Muscle or Muscle GT particle formulation. It seems more resisitant to oil absorption and reduced wear and tear, although it is also not perfect.

I also bought a Rock On LE, but before I drilled it, I had 2nd thoughts about that TEC cover. I sold it.
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"We get old too fast, and too late, smart."

Icon and Icon 2 use the Muscle coverstock.  Throttle and Throttle Up use Muscle GT.  Columbia's early particles (TEC - Chaos series, TEC2 - Rock series) had a reputation for quick death.  Other than Channel Surfer, I haven't seen many complaints about their newer lines.

http://www.columbia300.com/innovation/compare.cfm?list=160,165,147,148

http://www.columbia300.com/innovation/techdocs.cfm?id=15
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Penn State Proud

That's "Mr. Toe" to you.

Ron Clifton's Bowling Tip Archive