EZ TAG vs TX TAG what’s the difference?

Have had the EZ tag for years but keep getting bills in the mail for TX TAG. I’d like one toll road tag on my windshield so can I just get the TX TAG and it will cover me for all EZ Tag tolls?

Edit: after being on the phone with both toll authorities for 2 hours they both claim they both work for the same tolls, and I figured out the bill. Will probably switch to TX tag in the future if I’m able to get the balance in my current ez tag account transferred or returned, just not today because I’m done dealing with them.

I also read the 6 year old post with the same question before I asked but thought maybe something might have changed since that post. Thanks for all the replies!