I would personally get the first one, but I guess its just whichever one you prefer. It wouldn't make that much of a difference on the costume, but that's just my opinion. Also I suggest for any other Homestuck Cosplay questions you should post in the MSPA Thread (http://www.cosplay.com/showthread.php?t=216519
) since theres alot more experienced homestuck cosplayers there and also reading through the posts might give you some tips.
~Currently On Convention Hiatus~
In Progress Cosplays:
Young Link(LoZ:MM/OoT), Werewolf Princess(OC), Chell(Portal), Earth Bender(Avatar:TLAB), Vriska(Homestuck)
Ranma(Ranma 1/2), GLaDOS(Portal), Zelda(LoZ:SS), Terezi(Homestuck), Derpy Hooves(MLP:FiM), Gastly(Pokemon), Misdreavus(Pokemon), Shuppet(Pokemon), Hilda(LoZ:ALBW), Zelda(LoZ:ALBW), Ayano(KagePro)
Next Convention: Anime Central 2016
OH NO! The list is multiplying, run for your lives before it destroys the world!