It is same. My experience is that you won't get any advantage on rare (vr) items.
You can read about this here:
Community studies suggest that the composition of bonus items is identical to that of standard hack items and that every 30% of glyph or speed bonus, rounded up, causes another item roll to be added to the bonus. The rolls are made independently, and the agent can receive multiple copies of the same Very Rare or sponsored item.
One of the power of the glyph when you are with your friends, and there are 3-4 portals in range, make a farm (lvl 8 portals), and put frackers into the portals. Then heat sink, heat sink, heat sink, vr multihack. But this is another topic. And I hope, you are enlightened :)