It all depends, as does everything technical, in your definition.
An effective cut is not just a quick chop or hack like you're using a cleaver or ax. When attacking infantry from horseback the cavalry used different weapons depending on how they used the weapons and how that particular type of cavalry was used.
Heavy cavalry used brute force from boot to boot charges of heavy horse to smash through the infantry and they used relatively straight (or completely so) heavy sabres to chop down on infantry as they forced their way through. They didn't try to stick around to clean up after, and they had to have something heavy enough to get through a shako, leather pack and bedroll, and possibly a blocking musket. Nothing fancy was needed. A straight sword also made it easier to spear infantry past all that, but it had the risk of sticking in the body and gear and not allowing the weapon to be with drawn as the trooper rose past - leading to getting dragged out of the saddle or breaking your wrist. So the point wasn't used so much until the British made a big deal of it in 1907 with the redesigned for "modern" cavalry sabre.
Light cavalry, like hussars and such, used more heavily curved sabres in a different technique - more of a draw cut than chop, against other light horse units. Yes, they sometimes engaged infantry, but mainly they tried to stay away from them unless they were giving chase to a broken foot unit. Their mission was different, and accordingly their weapons were different. A draw cut is more effective in wounding than a chop, and the blade has to have a curve to it to make the cut really deep and long. The katana is perhaps an exception, but technique can make a difference there, too.
SO, with cutlasses and sabres we need to determine the type of cut used before going at it comparing cross-techniques from this century and weapon vs. another entirely different weapon and time period. Weapons and technique are tied to closely to each other for to much of that nonsense. Does the cutlass chop or draw the cut? Yes, you can thrust but is that even in the manual of arms for the thing? If the blade is curved, why? How deep is the curve?