^^^^ Carbonio is a useless piece of C/F bling, forget that as it serves no purpose.
The VWR (same as APR and newer ITG ones, rebranded IIRC) are the closed cannister ones, some say they are a little quieter, never tried a cannister one myself. Open filter would allow more air in, its all about the flow. My stage 2+ Eddy is more than happy with the REVO one, either that or the EVOMS IMHO.
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