It’s really hard to compare the two. The price range of products is completely different, and so is the focus of the products.
Looking at your questions specifically,
NickiQ nothing phone vs iphone based on camera specs,
Clear win for iPhone, regardless of the model.
NickiQ how many days can phones last in normal usage from 100 to 0 charge, how many hours of social media scrolling and video watching can the phones last from 100 to 0 charge
It’s really hard to give you an exact number, but you’ll probably get a solid 1-day battery life out of both brands, but it really depends on the model as well.
NickiQ how good is gaming on each device
Again, it really depends on the device, but you’ll get solid performance out of the two. It’s worth noticing though that iPhone only has 120Hz displays on some of the more expensive or newer models.
NickiQ which has the most affordable ecosystem that will be afforded by the general public aged 21 to 65
Nothing, being an Android device, has a much wider ecosystem so you can pick accessories across many price ranges, making it more affordable. But Nothing itself doesn’t really have its own “ecosystem”, just a bunch of accessories that work with pretty much any device.
NickiQ and how relateable is the technology across all ages.
I don’t really understand the question, but Nothing design is way edgier so I don’t think it’s as well-received by all ages as a more neutral device as an iPhone.
Honestly, while I tried to answer all your questions, your comparisons and questions are really hard to frame because both brands have multiple devices at multiple price points, so you can compare a $300 device with one that costs 5 times as much.