Long answer: Changing from one set of social buttons to another will not impact social shares.
the counters from almost all social share buttons fetch the share count from the social networks themselves.
Example: For the page www.socialtools.com, the counters are going to ask Facebook how many social interactions this URL had on the platform. Then, it's going to repeat the process for all other networks and display the correct number.
As such, all social buttons should show a very similar number of shares.
Note: If you change the URL or the domain, such as from www.socialtools.com to www.socialtools.net, this will result in loss of share count because social networks will not relate the old URL with the new one.