[Phalanx]

Kind of...but it's more like it looks different on everyone dependant upon their emotional/mental state, and also reflects how they in fact want to present it.
You can look up some variations, the punisher once wore it in a "what if" and Mac Gargan (formerly the scorpion) who currently has it.
I mean yes...it was slime, then parker had it, then brock had it, at which point it got the scary look...but it was also reflective of Brocks anger, hatred, and well...kind've instability to begin with. Whether or not these were character traits that were dormant and always there in Brock, or bought on by what you will see happens between Parker and himself...assuming they carry over the correct storyline...is unsure, but basically at the time he gets the suit, he's very bitter, angry, and self loathing...the suit itself in a similar state after being rejected...they made for an angrier, crazier being. The suit itself did not evolve beyond anything that it was capable in the first place. Brock just flexed different muscles, so to speak.
The "suit" also tends to carry traits from it's former incarnations over as well...if you look at the original spiderman black suit, then the venom character, then venom as worn by the fortunato kid for a short amount of time, then the mac gargan version, and I suppose even the 2099 and punisher versions (even though they are non-canon) you can see how it's reflective of who's underneath, and what traits it's "absorbed".
As well as aesthetic traits, it also absorbs personality (hence the warped sense of "justice" that's been evident in all of the venom comics = parkers good guy bit + Eddies crazy bit) traits, and tends to use information gathered for it's own benefit, eg - knowledge of the spider-sense allows this suit to be immune to it.
I'm sure one day Brock will make a return to the suit...or likewise...he will if he doesn't want to die anyways, and it's something that seems like a lot of the fans would want.