I think on paper it's easy to say that all coins are similar, but one line of bad code can be a big loss and experience with bitcoin makes it clear that we won't have big problems easily. To conclude the coin doesn't really produce anything. Their value is based on trust and use. Bitcoin is widely used and this is what makes bitcoin more valuable than other crypto currencies. Bitcoin is better tested at higher volumes and over a longer period of time which makes bitcoin more reliable than other crypto currencies.