The primary difference which sets the two apart in general terms is the fact that Buddhism is a religion whereas Confucianism is in theory more of a philosophy. This makes it difficult to compare the two as they aren't really highly related to one another. However, I will try and give details of the main viewpoints and rules which underpin both beliefs.
One main similarity between the two is that neither is actually focused around the belief of a God as such. Although Buddhists may believe in God in some ways; their religion isn't based on this belief, instead it is based on the teachings of Siddhartha Gautama (Buddha). Siddhartha Gautama came up with this way of life and understanding which has been followed since around 500 BC.
Those who follow Buddha, choose to give up a majority of the luxuries of life; opting to solely rely on the necessities. They forgoe ownership of televisions and cars; they are not allowed to drink, smoke or eat meat or fish; they do not save money and they do not waste anything. Buddhists believe in living a generally good life and will not do harm or lie.
The beliefs which underpin Confucianism aren't a million miles away from Buddhism as they again relate to the general good and positive. Confucianists have six primary beliefs, these are; empathy, honesty, love, loyalty, righteousness and etiquette. As with Buddhism these relate to maintaining a good soul and being a good person, but it differs in the exact points which it focuses on.
Buddhists believe in karma, which followers believe that their actions of the body and mind will produce future results and consequences. This is probably where the saying 'what goes around comes around' comes from, as many believe that negative actions towards somebody today will result in your own bad luck tomorrow.
The first teachings and the very essence of Buddhism is The Four Noble Truths, which is taught by the Dalai Lama. Teachings say that suffering is caused by a craving and once that craving is forgotten, the suffering will end.
