How important are tribal numbers in UG ?
Are the voting pattens as tribal as in .ke ?
Is there anything similar to "tyranny of numbers" at play there ?
Not as important as in Kenya. Because the main contestants, Museveni, Besigye, Mbabazi are all baNyankole.
It might change if NRM's stranglehold on power is lost. Though, it might never get to Kenya's situation where we have only had real power shared between two communities since independence.
You could say each major region has tasted power in Uganda over the years, though the westerners have had the lion's share thanks to stability.