Difference between oil cartel OPEC and OPEC+

What are the differences between oil cartel OPEC and OPEC+ ? Are there different members in each organization ? What OPEC and OPEC plus have in common ?

OPEC is an abbreviation of Organization of the Petroleum Exporting Countries. Its member countries generate a big part of world's oil production. Organization is currently headquartered in Vienna and it consists of 14 members:

• Algeria
• Angola
• Ecuador
• Equatorial Guinea
• Gabon
• Iran
• Iraq
• Kuwait
• Libya
• Nigeria
• Republic of the Congo
• Saudi Arabia
• United Arab Emirates
• Venezuela

OPEC+ consists of OPEC members and another 10 oil producing countries:

• Azerbaijan
• Bahrain
• Brunei
• Kazakhstan
• Malaysia
• Mexico
• Oman
• Russia
• South Sudan
• Sudan

Currently OPEC+ is a group of 24 members.