i would write a wall of text but im to lazy
the first one is definitely the best
the use of the splatters is done well but its a bit overdone in these it has good flow
the second one
has too many elements involved or at least it looks like that even though you can tell theres only a couple things in there the brushing is what makes it look cluttered and the fact that theres a random guitar there doesn't really help
the third one
seems a bit empty here c4ds dont really go with that style but then again i dont know what does the color scheme is nice though here
the fourth one
has good blending but i cant really tell whats up with the renders legs the random c4d ruins the flow that it had going this one isnt cluttered with all the smudge/brush but it seems dull it needs more of a wow factor to make it pop there are some irregularities in the lighting around the stomach which should be darker imo