Sudaruska is far better than DA/GF due to one thing: a working charge attack. DA/GF's charges may be better, but they don't work when near a wall, and because of that make the sword they are on almost entirely worthless. No one said it, and most will not agree with me, but it is an observation I have observed in both my own gear choices and the gear choices of almost every "new" experienced knight.
Given that brandish lines outclass DA/GF in terms of both costs and damage, the only reason to bring a heavy sword is if you're gunning and need a sword to push things back- or are supporting a strategy involving one. This isn't to say that you can't use them in place of a brandish, or that everyone will agree, as some may find DA/GF to fit their taste better. However, it is to say that when used properly, brandish lines will fair better than DA/GF.
The damage difference between DA and Sudaruska is negligible on neutral targets-
If DA hits for 250 damage, and Sudaruska hits for 240, it will take 25 hits of DA to make a difference at all, even when you combine it with the fact that you may be hitting more often due to DA swinging faster. Lets say it takes 3.5 seconds for you to swing DA twice and 3.7 seconds for you to swing sudaruska twice. That means that if you are hammering away tanking damage, you will do a lot more with DA. But you don't just sit there tanking damage. You move around, and you dodge things and you attack sparingly. The actual attacks per minute is going to be perhaps 4 of 5- a number that will not be that significantly different. Now, given that the difference between the two won't make that much of a difference (a bullet going toward you must hit you exactly 3.6 seconds in to make a difference, the chances are unlikely), then the actual difference in attack speed and only differnence in DPS is negligible. This of course changes on a specialized target- but again, it doesn't matter: DA is inferior to brandish lines in terms of damage and crowd control due to its unreliable charge making specialized damage a moot point.
Similarly- "Which is better, Sudaruska or Triglav"- Sudaruska pushes things away reliably; triglav you must be careful with. Triglav is much better if you are attacking with shivermist buster as the keystone of your strategy- Triglav can be used to repeatedly smash them with less chance of breaking the ice;
There are a few exceptions to this, namely-
-ICMF is much better for DA as the twins can be OHKO'd by DA charges
-If using max curse resistance with CTR trinkets, GF could become incredibly strong. There are few places where this is likely to occur however-
"they don't work when near a wall, and because of that make the sword they are on almost entirely worthless."
Uh. . . don't use them near walls? I have not had much of a problem with this.
"Lets say it takes 3.5 seconds for you to swing DA twice and 3.7 seconds for you to swing sudaruska twice. That means that if you are hammering away tanking damage, you will do a lot more with DA. But you don't just sit there tanking damage."
Faster swing also = safer shielding and easier dodging.
"-If using max curse resistance with CTR trinkets, GF could become incredibly strong. There are few places where this is likely to occur however-"
1) You don't need double curse max. 5 points of resistance (Max + Low) sufficies to limit the self-curse to one weapon.
2) This still doesn't make the GF "incredibly strong" by any stretch of the imagination. The charge still takes forever. You're usually better off just hitting the target normally.