Add Admob Interstitial (full Screen) Ads To Existing App With Admob Banner Ads Only

I currently have apps with just banner ads. I would want to use interstitial ads also going forward. I was confused about the following: Can i use the same admod ad unit for both

Solution 1:

1. Yes you can use the same AdUnit for both banner and mediation but doing so emans you have no way of differentiating between their revenue and eCPM.
2. I'm getting very good fill rates with Admob interstitials (95%+). Your mileage may vary.
3. Not mandatory to create another ad unit (as per 1). There is no way to auto generate ad units.