Does 4G LTE use more data than 3G?

So here's the story.
I have recently upgraded my phone from iPhone 4 to a Motorola RAZRRm while doing so, I lost my unlimited data.
When I used my iPhone I ran on 3G network which always seemed to work great.
Now that I have upgraded my phone I'm on Verizons 4G LTE network but seem to go through my data unbelievably fast. Now I have 2GB of data.
I have talked to tech support several time only for them to say they see nothing wrong with my phone.
And while poking around different things in my phone I came across the ability to change the network settings on my phone (global, LTE, 3G).
So I have two questions:
1. Does 4G LTE use more data than 3G and
2. Will changing my phone to 3G ruin anything?

It's not the network you use. Its because with androids you have apps that are tunning nonstop until you manually stop them. And some of those apps are using data even if you're asleep, so look for your task.manager and end all processes and restrict nackground data. Ask a verizon tech agent how to restrict nackground data

You are now using a phone that has all kinds of garbage running in the background.

Actually, the android operating system does not have more running in the background. Unlike the iPhone, which requires you to manually stop each and every app, the android only lets any given app or operation run for a limited time before auto closing it.

That said, any given website will still have the same amount of data transmitting regardless of the speed of the network. However, because the 4G is much faster, you are likely going through more data in the same timeframe.