A standard room at Pop may be a bit longer of a walk to transportation and the food court, whereas Sports is a smaller resort, so you would likely be closer to that.
I do prefer the food choices at Pop, since it's a bigger food court. But, Sports last trip (spring break), any time we went to grab food it was never crowded (we never did breakfast, though, and the one morning I walked through to get something from the front desk, it was mobbed).
We loved the fact that at Sports, our first night, we were so exhausted that we ordered from their "pizza delivery". They have a decent selection - I got spaghetti & meatballs, and the girls (my DD and her classmate) got some chicken and pasta dish. I see Pop has added that now too! It was nice, as we had landed early, took ME, dropped off our carry on bags, and spent all afternoon at Epcot. Less than $50 for dinner for 3 including service charge and 18% gratuity.
I would stay at either again, but from now on I'd only do preferred at Pop. We were in preferred at Sports (surf's up building) but it's a smaller resort.
Disney Springs to me is somewhere I don't want to go again. Bus stop to head back to the resort is quite far away, and I'm not into shopping! To me it's just a huge shopping mall. Had lunch (which was pretty tasty) last day there with my sister, party of 7 (two adults, two 18 year olds but my DD ordered from the kids menu, and her 3 kids) 2 glasses of wine for me, 2 sangrias for her, and she treated - $300 for lunch (this was at Bongo's). Food was pricey! Her one daughter ordered shrimp and basically ate 4 bites of rice for a $24 entree! If you love shopping, go for it. I hate shopping, but the girls wanted to browse the huge
Disney store. I had to sit outside - it's just sensory overload in there, LOL!
I think you'd be happy with either choice, but also they are doing major renovations at Pop. I heard that although they are taking on one whole wing in a building at a time, the other side of the building can hear noise during the day while they work. That may play into your choice.
Theming - I loved Pop. Sports theme wasn't a draw for us, but we got the room type we needed so that was priority (we need a roll in shower, and it was cheaper at Sports).