Its more on how the charging system works, with some phones, for example the motorola 266 and 262, when you place a call it halts charging, the phone is working of the battery alone and not straight of power, as soon as you end the call the charging kicks back on and begins charging the battery again, in some cases like perhaps a very short call it will not use a cycle in other cases it will. As far as the logic above, it is the same difference, conditioning doesnt really matter with the new batteries, its more the effect on recharging of the lithium, it can only tolerate being recharged so many times before it neutralizes permantly and stops giving electrons (this process is known as cycles). And with the nature of lithium, charging it 10% and charging it 90% is the same, it doesnt know the difference.