What Final Fantasy boss is harder Omega Weapon or Ruby Weapon?

If you are talking about the Omega Weapon from Final Fantasy VIII then I would say that Ruby is harder for a number of reasons, first of all Ruby Weapon is much more resistant to physical and magic attacks and there's really no easy way to beat it without cheap materia arrangements and other tricks. Omega has a lot more HP (I think) but you can use a number of items on yourself to make yourself invincible and it is very easy to manipulate limit breaks to get Squall's lionheart over and over. So in my opinion Ruby Weapon is harder.