BH requires a LOT more oil in the heads and midlane to peform adequately.
While the Cell is early and controlled, it does not require nearly as much oil. AS near as I can tell, the Cell can "live with" medium to medium-heavy oil and will handle heavy (depending on drill and bowler's release). The BH requires a minimum of medium-heavy oil and would prefer true heavy oil.
BH is 3% load of particles. Cell is solid resin.
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"None are so blind as those who will not see."