Kaggle notebook Vs Google Colab
There are several rundowns between the two services like this one.
Key for me:

Only Kaggle supports R, only Colab supports SWIFT
Colab is a Google product and is therefore optimized for Tensorflow over Pytorch
Colab is a bit faster and has more execution time (9h vs 12h)
Yes Colab has Drive integration but with a horrid interface, forcing you to sign on every notebook restart

Kaggle has a better UI and is simpler to use but Colab is faster and offers more time.