Mahonia aquifolium is referred to as Oregon grape or sometimes Oregon grape holly or just grape holly but not Oregon holly. And the plant in the photo is not a mahonia. This is definitely an Ilex, most likely Ilex aquifolium or as Dorie indicates, a variegated English holly. It most likely did not produce berries previously because there was nothing available to pollinate it. Holly cross-pollination is complicated - flowering times must be concurrent as well as using compatible species. The Blue Prince could cross-pollinate as one of its parents is I. aquifolium. American holly (Ilex opaca) could also serve to pollinate. The male plants do not need to be extremely close by (within ~400' or so) but the bloom periods must coincide. Berries may or may not be present or produced in much quantity otherwise. You would have much better success if you obtained a distinctly male cultivar of English holly, like 'Silver Queen' (yes, its a male, despite the name :-)). 'Gold Coast' is another male cultivar.

Probably not much difference but you will need to have planted at least one male holly, for example, Ilex m. 'Blue Prince', to have all the 'Blue Princesses' flower and develop any red holly berries. It only requires one male in the vicinity of multiple females to get a fruiting display. I have my 2 hollies, one Blue Prince and one Blue Princess, planted about 3 to 4 feet apart. They have grown together, and the female puts on a great display of red berries every year, but it depends on the look that you want to achieve.

I have a few holly bushes, I think the variety is 'China boy' and 'China girl' with both needed to get the berries. They really don't grow very fast. 8 years later, they're only 3 or 4 feet high. In contrast, I have lilacs, which are not considered fast growing, that I started bare root 10 years ago and they are over 8' high now.

My understanding is that the male plant should have flowers rather than berries. I suspect they were mislabeled by Lowe's suppliers. Pam