There are always some changes when Microsoft changes versions. This are slowly noticed by the Consultants and end-users.

Few below which I noticed:

· Colours of Business Process Flow Area on Forms have changed:

CRM 2013:

CRM 2015:

· Navigation changes for Security Area from Administration area for Teams, Security Roles, Users etc.:

CRM 2013: Navigate to Settings->Administration

CRM 2015: Navigate to Settings->Security

Note: Standard Administration functions are still under Administration Panel:

Hope it helps!