Lifecycle Stages (Lead, MQL, SQL, Opportunity, Customer): focused on letting us to know the maturity of the contact, his relationship with sales.
Sales Status (New, In Progress, Disqualified, Refer to Partner, Customer): helps us to know about our relationship with the contact, if already in progress, etc. This is important to know for how long sales is working with the contact and help us to create strategies around it.
**Current Status (Active, Inactive): **can be used in all times for contacts, meaning if there is any active sales/customer relationship or not.