T5x Model vs T5 which one is better ?

[rajneesh407]

I was trying to work on a project where I wanted to use T5 Model : https://huggingface.co/t5-base I have few questions, if someone can please clarify it .

Q1. What is T5 a model or a codebase to train a model ?
Q2. What is T5X a model or better and more optimized codebase to train a model ?
Q3. If T5X is a codebase to train models, then where can I find a t5x version of T5 model, I am not able to find anywhere on hugging-face ?
Q4. For T5 model and same T5 trained with t5x codebase, would model output be same if everything else is constant.
Q5. Where can I find, the T5x model for T5 model ?