Analysis is a skill that is required to bring out the reasonable outcome from the available data. With deep analysis you can make satisfactory decisions.
Business data analysts are data analysis experts and they utilize data quite efficiently. They can make decisions which can turn an organization into a progressing company.
A data analyst is basically an IT expert who majorly deals with the gathering and analysing data. They individually gather data and extract out outcomes as well. They make business related decisions as well which are independent of the decisions of the business analysts.