Collection vs. context variable for storing table data

[Meneghino]

We can store table data both as collections or as context variables.

Does anyone have any idea when to use a collection or a context variable to store a table? (Except for the fact that the context variable is defined only for one screen, and collection is global)  Any difference in performance?

PS I credit this post by @Brank for making me realise you can store records and tables in context variables.

[v-micsh-msft · Accepted solution]

Well @Meneghino,

i have nothing new other than the online document:

Understand Variables in PowerApps

For using collection with table, I think that depends on what you would like to deal with it.

Collection would hold the table in local, which I think should be better performance than query directly.

Not sure about the context variable.

Regards

[Ondrix]

Over time link has broken, new link: 

Working with variables