Which barrel is better LW or cz

It seems that is not just the barrel but the rifle as a whole. 

My Air Ranger Sniper is super accurate. Much more than my Bantam Sniper. Both have LW. 

My Uragan is insane accurate as well as my Vulcan 2 Tactics. 

My Evanix Rainstorm in 30 Cal, non LW nor CZ and not regulated, is as accurate as my Vulcan 2 Tactic in 30 Cal.

There are accurate rifles with either barrels. And are not so much accurate rifles with either barrels. ST normally are also accurate.