I think some cultures are better than others since other cultures have more things than others. For example, they might have a more advance technology or a better sense of morality. However, morality is based on what cultures have influenced on you. In all, how many of you would rather live in North Korea ?
No, some cultures are not better than others. Personally, i believe that yes, you can believe that your culture is better than others. Theoretically, no cultures are better than others. Take Amish people for example, there culture strictly prohibits dressing in store bought clothes. All pieces of clothing should be made by hand. Even though some outside of the culture may call it "weird" it doesn't matter, because that is their culture and we can't change it. Also, some cultures do believe that they should not advance technology... But, how does that make them less than other cultures? Buddhists is a very faithful culture, they pray many times a day. Does that make them better than other cultures? No because praying is a very big part of their culture. So, to conclude, i do not think some cultures are better than others.