As I understand it there is an obligation (See Shulchan Aruch Yoreh Deah 240:22 httpShulchan Aruch Yoreh Deah 240://hebrewbooks.org/pdfpager.aspx?req=9147&st=&pgnum=11822 ) to honor an older brother similar to that of honoring one's father. Since the obligation to honor one's father can have strong implications, in what way (if any) is the obligation to honor one's brother different?