We all are genius who suffer learning difficulties because we are specialists in our individual fields. Each person is just as worthy as another but can not be a genius in all things. We have to learn as life brings us more challenges for which we succeed or fail. Some skills we just can't grasp, whilst others we excell. That is the beauty of a diverse society!!
In order to answer the above question, we need to understand what intelligence really is. As a starter, here is an article that covers what we all have learned as to the value of intelligence: ie. logical intelligence. This seems to be the bench mark of what we judge as intelligence. It seems that jobs that stem from the logical component of intelligence appears to be thought of as a higher value in society today.
Learn more: http://hubpages.com/education/Psychology-101-What-...
Of equal value - in my opinion - is what is described as multiple intelligences. This talks about intelligence as described in the first paragraph here and it is worth understanding intelligence in terms of this by reading the following article as it talks about the many components of intelligence: http://hubpages.com/education/Psychology-101-What-...
So, to really answer your question, it is what us as a society (social construction of reality 'Bandura) that judges intelligence and, thereby, places various values on the skills and professions for which people specialise in.
The two examples you have given demonstrates that neither one or the other are greater or lesser - they are just specialists in their fields yet they both have learning difficulties should they have swapped professions.
Given the opportunities, training and background, a question could be asked as to whether both could have learned each other's profession given the chance?