There are several problems with any argument about these two pieces of weaponry. First of far too many people are trying to compare the aspects of two entirely different things such as the taste of a banana to the taste of an apple. The two just don't compare. Now both sides can go back and forth saying "oh this is better" or "nah this ones better" in the end your just running around in circles reading a pointless argument. The second problem is that this argument is far too one sided, most of those who have posted here are the proud owners of a Chaotic Rapier and there are a few who are the proud owners of a Chaotic Longsword, but none as far as I have seen have responded that have acquired both pieces of weaponry. One side cannot say that the other is worse and theirs is better simply because they have not used both. Let me explain, most people I know that own a Chaotic Rapier participate in Player Killing and Slayer with the occasional Bosses, and are not maxed players, thus they prefer speedy hits over a hard hitting weapon. The same can be said the other way around, most people I know that own a Chaotic Longsword are hardcore boss killers and are already maxed so they are accustomed to waiting another half a second for a higher hit. Again comparing the tastes of bananas to the taste of apples, you can't compare them easily unless you own both. Third of all, the GWD boss side of this argument is again one sided, remember that there are FOUR bosses contained within the walls of their frozen confinement not ONE. Three of these bosses can be meleed while the fourth is just out of reach of all melee weapons. Most people tend to solo Graardor simply because he is the easiest and least dangerous of all the bosses, but when comparing items of use one has to remember that there is more than one use for a weapon. Most people say Chaotic rapier against Graardor, however that does not answer for ALL of the other Bosses within Runescape. In my opinion both weapons are pretty even when it comes to Slaying the giant Graardor, I have seen many videos and even tested both weapons myself and I find them equally balanced, however as I stated before Graardor is not the only boss on Runescape. Tormented demons, Kril, and Zil are all examples of majorly killed bosses in Runescape, mostly because of their drops of high value. In my experience I have seen Chaotic Longsword used more often at Tormented Demons and Zil, simply because that is were high hits from slash are required. Zil is weak to slash attacks which is why The Godswords are the most useful weapon there, and at Tormented demons you only have to deal 300-310 Damage before the Demon changes its prayer and with or without void it is very common for a higher level player to easily deal the 300-310 damage within the first attack after switching weapons so the Chaotic Longsword takes the bone there but that doesn't necessarily mean that the Rapier cannot be used at either, it merely states that the Longsword is preferred there because of its slash and high hit capabilities. Last but not least I say that there are just far too many unaccounted variables between one player and another for either of these weapons to reign supreme. Overloads, Curses, Armor Bonus's and Skill levels and other random variables hidden within the various coding of Runescape itself. So in the end I hope that you all have learned that comparing the taste of Bananas to the taste of Apples cannot happen, in the end it all comes down to preference and what one player wants to do over another, the choice is the players own in the end. I believe that neither of these weapons reign supreme over the other but mere have strengths over the other's and balance each other out instead of there being one supreme weapon. Personally I tent to do more bosses and stay away from Player Killing and I am already maxed and am the very proud owner of a Slayer cape having reach the level of 99 in slayer, so I have no need for a fast hitting weapon for occupations such as slaying man and creature alike. So the Chaotic Longsword would be the best bet for me would it not? Truthfully I only got Rapier because I love the slayer skill and do train it here and there regardless of my 99 status and I have to say I do prefer it over any other while slaying. I have used both of them and honestly I hardly notice a difference really, a kill is a kill to me and thats the end of it.