Yes, I understand that Marx and Engels did not have realistic political ideals
Have you read any of Marx? I'm not an ML but if you even glance at Capital you can tell that Marx's whole schtick was using science to come up with realistic political ideals.
This is like a children's picture book-level of understanding of the differences between these. This same group of people are responsible for getting you things like healthcare, or the 8 hour work week, or fucking paid vacation. Maybe listen to them and read a little more before posting dumbass takes like this.