I am guessing you got these beans already roasted?
Generally, the green beans are similar from crop/estate/year and after grading AA or whatever, but they are then left in the hands of the roaster, who can:
a. Roast them to bring out the best in the bean, light, medium or dark, whatever,
b. Roast them to extinction, and end up with charcoal, or
c. Something in between.
When you try roasting these beans yourself, you will quickly find out what you like and dont like....I am not a great fan of Kenyan coffee, though others might say it is their favourite!
Enjoy the coffee 8-)