They are practically neck and neck in terms of what they offer to the market. If you're looking to buy a camera, you ought to know what sort of stuff you are most likely to shoot, then identify your needs, shortlist some models that fit your budget, and try holding them and playing around with their interface to ensure you are comfortable with the ergonomics. Even within the same brand, the button and menu layout may be different, so don't jump to conclusions on a brand simply from the interaction with one camera body. Ideally you should get what you are comfortable with, then use the equipment to its full potential.
Another thing you should consider is the lens lineup by each camera brand. Some brands may have 'better' lenses for certain types of photography, so you should bear that in mind too. I have not mentioned any particular brand, simply because I think you should make the decision yourself, after having tried out the gear that's available on the market. It's likely to be a tedious process, but it will be worth your while when you've found one that suits your photographic needs.