Magento - difference between resource and mysql4

Question

can anybody tell me the difference between creating a model extending

Mage_Core_Model_Mysql4_Abstract

and one extending

Mage_Core_Model_Resource_Db_Abstract

I noticed that for example Mage_Cms is using resource instead of Mysql4, and that in it's config file myslq4 is marked as deprecated but I can't find anything in the official phpdocs that mark mysql4 deprecated?
I'm using Magento EE ver. 1.11.1.0

Answer 1

As of 1.6 Community Edition (I don't know about EE), Mysql4 was deprecated in favor of Resource

See explanation pdf