Damage wise, Barb 1 gives you 4 damage skills, embowel and stomping kick are a little underwhelming at the moment unless you use some shenanigans. Helm splitter give you a good strike skill (not as good as cartar imo), it also stuns the target which lets cleave do x2.5 its normal damage which is also nice. However with the new update, cleave inflicts a slash weakness debuff that lasts 5 seconds where all slash attacks do more damage. So that’s cyclone, skyliner, vertical slash, redel, zucken, ect.
On the other hand with swordman 2, Bash gets an AOE Attack increase attribute, the same as the wagon wheel one at highlander 2. Restrain can be useful with cyclone or any move that is a large multihit against mobs, the stun doesn’t last very long apparently, however it’s mostly used for pvp purposes. A new attribute for thrust will inflict bleed on a stunned target. Pommel beat isn’t really a strong strike move but it has a lowish cd with 3 overheat (then again so does cleave).
So imo barb1 will give you more damage simply because of the cleave debuff, while swordsman 2 will give you more utility against mobs / lvl 10 pain barrier. If you really want barb1, I’d just make another character, the road to 100 is not that bad, your current character can help increase your team level and the grind has yet to start. Unless of course you want to spend money on it. You’ve spend about 500,000 silver on your character maybe? You’ll get a lot more than that later on and the damage enhance attributes are much more expensive.
However in your end it’s your character, and your choice. (Apologies for the wall of text)