This is what the Neewer-700 and 7000 are is supposed to sound like, as you can hear, there is no noise. For the 700 he is connected via XLR-3.5mm to USB adapter, the USB adapter is supplying 5V of Phantom Power.
On the 7000 it is using the supplied USB cable. If your Neewer 7000 doesn't sound like this then you should return it. Thw cable is probably shite.
Nowadays though the USB adapters are garbage and can't supply enough power, your cable is no different.
You are setting yourself up for headaches trying to eliminate noise, when you could spend a few more dollars and have no noise. It's a power issue, the mic isn't getting enough power, which forces you to boost the gain, which boosts the noisefloor, makes the mic sound like ass.