The problem with both is that, at first, their stomach can sometimes hold more than it can handle.
There are BLW babies who eat until they throw up and go back for more. BLW won't prevent this.
Frankly, the BLW vs TW sounds like the BF vs FF. Yes, some people will shove food down their baby's throat- pinching the poor kid's nose when the baby refuses to open their mouth. Some babies will open their mouth for every spoonful even when they're full. But that's not true of everyone. My baby says very clearly whether or not they want another bite- I can offer the spoon a dozen times and they won't take it if they don't want it. At the same time, a BLW baby who decides food is the bomb can self-feed even when they aren't hungry just because they enjoy the taste and texture and stuff, resulting in throwing up and as many problems.
TW may make it easier for babies to overeat because it's easier to force a kid to swallow purees than to chew and swallow a biscuit- but it's fully possible for a TW kid to self-regulate and for a BLW kid to overeat.