Let's just cut the brands to 5 by removing same brands:
We have left to right: Lego, Lepin, SY, Xinh, Pogo
Even closer look. It is not an illusion, SY batlogo looks more colorful comparing to Lego version.
Lego, Lepin, SY, Xinh, Pogo
Inspect utility belts.
Lego, then Lepin. And if you ask me, I would pick Lepin or SY belt versions instead of Lego one (they are more 3d to me).
Sy, Xinh, part of Pogo
Xinh, Pogo
Pogo loses here in the terms of quality - objectively the worst here. Xinh is so so.
Capes.
Lego has very soft cloth material, but also solid.
Lepin is very very thin, feels more like plastic than cloth (worst here).
SY has typical SY cape, material is pretty nice.
Xinh is velvet and collects dust just perfectly.
Pogo has the most dense material of all, it's pretty strong, but as I've mentioned I used custom capes on other Pogo Batman minifigures.
Lego, Lepin, SY, Xinh, Pogo.
Cowls off.
Only Xinh looks different from them. Others are pretty close to Lego.
Lego, Lepin, SY, Xinh, Pogo.
Second faces:
Again Xinh is different, doesn't have second face at all (the worst here).
Lego, Lepin, SY, Xinh, Pogo.
But also there's additional contestant, which I decided not to include in the comparison above, because it's made with mistakes. It's LELE. As you can see minifig has 2 utility belts: printed and real one.
Besides the head is from the other model and printing is not so nice.
So if you ask me, whom I would pick, I would say SY was one of the closest to Lego, besides I like SY utility belt more than Lego one and the batlogo is more colorful than Lego. UnfortunatelySY minifig was bought in the set and is not sold separately yet, but I hope they'll make a new Batman Movie set soon.
The most interesting part goes here.
The differences in molding or how to distinguish different brands.
First I have to say that we're gonna skip legs as they are almost identical (since we don't have Decool here - there's no point in it).
So let's start with torso or how torso docking part looks (where you attach legs).
Lego, let's call it criss cross
Lepin, almost empty
Sheng Yuan, little plastic stripes, that divides torso in 3 sections.
Xinh, criss-cross, Lego-like
Pogo, something special actually (Btw KL has same shape of leg docking, so it's one more proof that KL belongs to Pogo)
Lele, like SY, but thicker. 3 sections
As you can see, all manufacturers are different. But there are more differences. Let's look inside the torso and at the hands connect to it:
Lego: the hole for arms is not cross-cutting, the torso is whole inside.
Lego. The hand connects to the torso with round connector, which has small gap in it.
So what about chinese brands?
Lepin: the hole is torso is cross cutting, hand connector looks like a screw cap for a flat blade screwdriver.
SY, looks like Lepin. Bit t has very thin stripes on the inside, just looks at another angle and you'll see them.
Xinh is different, the hole is torso is more "half-shut". Same not Lego-like hand connector
Pogo tries to be Lego-like, not cross cuttng hole and round connector with smal gap.
Lele has hole, but round with gap hand connectors.
So summing up. They all are different, but still distinguishable. But remember that this is only about latest minifigures. For example, Pogo itself had changed torso docking mold at least twice. I'll try to make a whole new post where I would include more manufacturers and their differences along with how they've changed.
Also at first I wanted to compare more Batman movie minifigures - Joker, Robin, Batgirl, but the post already is way too big for that. So was it interesing, any advices?