Tourist visa, self explains that it is a document required for an individual to enter a Country for a limited period time with a specific purpose of tourism. A person entering another Country under this type of visa is not eligible to work either temporarily or permanently. On the other hand, a visitor visa is for a person who intends to enter and remain in the Country for reasons ranging from medical treatment, visiting family, business purposes, etc.
In certain countries, both tourist visa and visitor visa are considered under the same category of visa while some other countries categorize them under different category
A tourist visa will clearly specify the duration of stay as also the purpose which is tourism. On the other hand, visitor visa can be for any purpose ranging from medical treatment to visiting family. Visitor Visa's are generally granted for a longer duration and may be extended depending on the reason of stay