Is the reward for prayer (whether obligatory or supererogatory) different based on the length and speed of the recitation?

A longer prayer, by fulfilling its pillars and increasing recitation and remembrance within it, is better and more rewarding than a shortened prayer that only fulfills the obligatory minimum, because mere sufficiency does not indicate perfection. Increased recitation increases the reward, as each letter earns ten good deeds. Similarly, increased glorification (Tasbeeh) and praise (Tahmeed) increase the reward in prayer, and recitation within prayer carries a greater reward. Exceptions to this are prayer behind an Imam, the two rak'ahs of Fajr prayer, and circumambulation (Tawaf), for which brevity is preferred. A Muslim must not prolong prayer in a way that distracts him from contemplation and humility, for a person only gains from his prayer what he comprehends of it. Moreover, reciting the Qur'an with contemplation might be better than prayer if the prayer does not achieve the required humility.