If a ship has no weapons and designed to flee then Engine Focused is best. Engine focused w/ super capacitors allows the most frequent boosts giving max speed
By a tiny fraction, this is false! Engine Focused gives 44% ENG recharge, whereas Charge Enhanced gives 45% recharge to all three.
@Aleks Zuno is correct. Increased distributor capacity does not allow boosts to happen any quicker.
Intuitively the Engine Focused distributor would allow 3 boosts faster because it has the energy capacity to quickly allow a quick second boost... but this is not how the distributor works. Boosts take a fixed amount of time as long as there is sufficient energy in the distributor.
It doesn't matter how much energy the distributor has in it... a boost takes a fixed amount of time. Engine Focused has more energy capacity so graphically a boost appears to use up less... but of course it is actually using the same amount of energy and recharges that energy at the same rate. With full pips to engines both distributors recharge at the same rate which is faster than the time to boost.
Testing confirmed this.
Exact same ship time to boost 3 times (timing from 1st boost to 3rd boost, all pips to engines):
a) 7A Distributer Engine Focused & Supercap.
9.89 sec
9.50 sec
9.43 sec
b) 7A Distributer Charge Enhanced & Supercap.
9.55 sec
9.69 sec
9.68 sec
In this test the recharge rate is faster than the time required for a boost. So the distributor fully charges before the next boost can happen, and the extra capacity is of no benifit.
It is interesting to note changing the pips affects the recharge rate but does not affect the boost time. Reduced pips gives the exact same results, unless the distributor gets depleted. Reducing the pips will make the recharge rate slower than the boosting time, so the capacitor can get used up.