You'll normally get more out of the first half of the battery than the second when going by the battery percentage reading on your phone.I found a screen shot of battery usage on the 7 that I had and was quite surprised to find one.
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So I had 2% after 10 hours and 8 mins of usage.
Here is the screenshot on the 7 Plus that I posted earlier:
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So assuming linear depletion, the Plus would have 2% battery left after 12.8 hours.
Typically the difference will not be that much, I was 50/50 on wifi/LTE for the Plus and 25/75 for the 7.
Your 7 stacked up quite well against your 7 plus.