This includes GF, DA, Suda, Triglav, Hammer (and any other that I missed)
1) I know the attack speed of these weapons aren't all the same. Does DA and GF have the same speed? Does Suda and Triglav have the same speed?
2) Does Hammer have the same speed with any of the other heavy weapons?
3) Are all the hitboxes (exclude hammer dash) for these swords the same?
If someone could, could someone list the order of swing speed?
Here are the data that Parasthesia mentioned:
http://wiki.spiralknights.com/Lancer_Knightz_(Guild)/Sword_Combos_Per_Minute
Try clicking on the triangles in the +6 column, to sort the swords by comboing speed at ASI+6. Of course, comboing speed is just one way to measure the speed of swords, but it gives you a good idea of what's going on.
Yes, their hitboxes are identical, or at least so close as to be essentially identical.
GF and DA are basically the same speed.
The Gran Faust combo speed may be the teensiest bit slower, based on the Lancer Knights data on combos-per-minute and stuff.
Triglav/Sudaruska swing speed is slower than DA/GF: basically, Triglav with swiftstrike asi high is the same swing speed as DA unboosted.
Hammer swing speed for a single swing is the same as the DA speed, as far as I know.
The swing range for all of the heavy swords is the same; I feel the triglav/sudaruska is the most accurate in representing it but it's model actually extends beyond the swing range for a pixel or two.