I'm fairly new and I've been told that this high vg juice would be really unpleasant to vape.
Oh I'm sorry - I miss read - its %70VG NOT %70PG!!
I'll say that your talking to the wrong person then.

I vape %90-VG/%10-H2O.
VG has a somewhat natural 'sweetness' to it and produces more "cloud" then PG does so juices with high VG content will produce more vapor.
Assuming that your using factory coils right?
So assuming that the same exact wire type and inside diameter is used, coils with higher resistance have more windings (more wire) then coils of lower resistance.
When it comes to vapor production it comes down to temperature and surface area. So assuming the same wire, coil type and inside diameter a coil with more windings (higher resistance) will have more surface area and produce more vapor.
Pure %100VG can be to 'thick' to wick very well so I add a bit of water to thin it out making it pour and wick better.
Actually what I'm vaping right now is %90-VG/%10-H2O (no flavoring at all).
g.