//content.invisioncic.com/y282845/emoticons/waycrazy.gif.f4a380c3f94043939fd369defd9e6be2.gifThe way gauges work is there's the standard diameter of "1 gauge". A 2 is small enough that two wires would fit in the same space as a 1g. Then a 4g is so four would fit, 6g is six, etc. That's how gauging works (learned that from stretching out piercings, oddly enough).
So two 4g wires won't be as thick as a single 0g, no.