If you mean godswords, then Armadyl and Saradomin godswords are totally different. Yes, Armadyl is able to hit higher but that is only important when in Bounty Hunter, yet Saradomin GS is widely used amongst slayers and people hunting monster drops because it heals hitpoints and gives you prayer, when special attack is used. That is the difference, not everyone goes to BH, that is why Saradomin GS has a more wide market, thus making it more expensive.