Which is better, to hire a professional experienced person or a person with higher certificates and knowledge?

Actually, It depends on the Job itself.
For Some jobs you will get the best result from people who have knowledge.
For some other jobs you will need experienced candidates.
For example, For management jobs, for sure you will people who have experience in this field.

Your question brings out three qualities : (a) professional experience, (b) educational qualifications and (c) knowledge and/or skills.  If you have a close look, you will find that the first two are ways of acquiring the third - that is, through experience and education you acquire knowledge and skills.  for recruiters, in a limited time span, it is very difficult to assess your knowledge and skills but very easy to ascertain your experience and educational qualifications with the help of documents.  unfortunately, you cannot provide any documents to prove your 'knowledge and skills'.  but we must understand that it is knowledge and skills that ultimately ensure that you are a contributor in the organisation when employed.  

Both the options has their own pros and cons, it depends on the risk appetite.
For instance, hiring an experienced professional, who has hands on experience in the field but not abreast with the current changing/fast paced growth, regulations and so on...he/she might be of helpful but he/she needs someone to help him/her to be compliant to the regulations of the current world.
In the second instance, take an individual with some certifications, he/she knows the regulations in theory but lacks the practical challenges involved in the field as they are novice.
However, a very old adage - We all were novice when we began! can not be ruled out in both the scenarios.
Precisely, chalk out the requirements on one side and pros & cons of hiring (Exp/Novice)on the other side to understand who is the best fit for the Position.

I think it depends on the skill you are looking for, In general if you are looking for machine operators then you should go for experienced guys and if you are looking for marketing & sales professions then I would say education and knowledge should be preferred.

But experience should not be restricted only to operator profiles as in almost all lead positions and top management position education and knowledge doesn’t not matter much than result oriented experience.

Knowledge and certifications only helps in flow of different thoughts.

 

 

If that's your binary then I feel you are looking for glass in the sand ie you can find it there, but it will take a really long time. How about looking to character and seeing who fits the job, the work environment where the business wants to go, and who might truly respect/enjoy her/his colleagues and be respected/welcomed by them.