I suspect that particular sword is called a “Paladin Sword” simply because they needed something cool to call it. It looks like a broadsword to me, although it’s hard to get a real idea of its length without something else in the picture to give it some scale.
The Claymore was a Highlands weapon, a great big honkin’ long two-handed sword requiring considerable strength and no small amount of training and skill to use properly. The idea was largely to wave it around so hard and fast that it was suicide to get too CLOSE to you, due to the speed and mass of the cutlery you were waving around, and the fact that you had six to eight feet of REACH with the thing. One-on-one, with little or no armor, a guy with a Claymore and some skill with it could knock the doodle out of anyone who didn’t have one.
You or I, on the other hand, would get filleted if we tried that, due to the fact that I haven’t made a point of working out with a twenty pound sword three hours a day for the last five years, and neither have you.
Definitely a specialist’s weapon… but quite a sight to see, in skilled hands. Fell out of favor due to the extreme difficulty of using them while operating in RANKS – the Highland Scots were never big on regimentation, at least not before the English knocked the poop out of them, and the English proved that a team of drilled, disciplined men could, as a general rule, beat a wild-assed mob fighting one-on-one instead of as a unit… even when the mob was made up of better, tougher fighters.
As to “Excalibur”… hell, some of the best swords ever made are being made right now. We know more about metallurgy, physics, and weaponsmithing today than at any point in the past. Unfortunately, our technology has also encompassed far more efficient ways of killing each other than swords.
But swords are, at least, COOL. Even when you’re not actually trying to kill each other with them. I mean, swords are so cool, we invented a sport, Fencing, in which we duel with swords. Can you imagine trying to do that with .45 automatics? Mortars? Cruise missiles?
It is important to note, however, that many of the improvements being made today on modern swords are NOT intended to make the swords better weapons. Most cutlery you can buy from catalogs and the Internet is more for show than for any kind of serious use. Many of the improvements are to decrease the amount of required maintenance, and to make the weapon in question look more attractive…