i have all the cells and ive thrown most of the break series, they are good stuff, when it comes to the pearls, in my opinion they are very similar, both hit very hard and can cover some boards, if anything the cell pearl's coverstock might create some more friction on oil and seems to be slightly stronger(were talking like 3-4 boards) compared to the break pearl but overall they are very close, you cant go wrong with eather one
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Nothing Hits Like A Roto Grip
In The Bag All 15s:
Roto Grip Rogue Cell
Global 900 Break S75
Roto Grip Grand Illusion
Raw Hammer Toxic
Roto Grip Neptune
WWF Rock Spare Ball
//www.bowlsk.com/view-profile.html

the break point is more of a hybrid coverstock, its a mix of the break pearl and the break s75, plus they tweaked the core to make it longer and angular then the s75 but smoother then the pearl

compared to the cell pearl, it will have a little less length and be a little smoother off the break point
--------------------
Nothing Hits Like A Roto Grip
In The Bag All 15s:
Roto Grip Rogue Cell
Global 900 Break S75
Roto Grip Grand Illusion
Raw Hammer Toxic
Roto Grip Neptune
WWF Rock Spare Ball
//www.bowlsk.com/view-profile.html