Tree is the situation, that is benefiting one person more than other.
Equality means you provide equal help to all and expect them to be equally benefitted. Sometimes that doesn't work.
Perfect example would be a Spaniard and Frenchman learning a new language, say Italian. This would be easy for a Spanish person because Italian is similar to Spanish. Not so much for French. Providing them both with 10 hours of language classes will be equality but results won't be equal.
No mate, communism is having state managed Apple pickers that pick apples and give them to manager. Management keeps 40% apples for themselves and then divide rest between the whole town, so that everyone in town gets one tiny piece of apple, whether they like apples or not.