Targeting two fields with the same query or one field gathering contents from both ?

[Xavier Schepler]

Hey,

let's say  I have :

- a field named A with specific contents

- a field named B with specific contents

- a field named C witch contents only from A and B added with copyField.

Are those queries equivalents in terms of performance :

- A: (the lazy fox) AND B: (the lazy fox)
- C: (the lazy fox)

??

Thanks,

Xavier