It's good that you have access to both; out of curiosity, is there any differentiation in the way it list them in the menu where you pick which one to use, or is the order consistent? I can imagine being mildly annoyed if I had to guess every time I logged into a new device which one was the one I wanted, although obviously that's still better than just not having a choice.
>>saghm+(OP)
The one created for google+ is usually listed first. After signing into my google account on a new device, the google+ one is also the one that I'm usually automatically signed into.