sorry @Fubar I click too fast on accept solution.
Now my DEV portal and PROd match
However, i have strange behavior because sometimes my changes on the dev portal are not visible on the prod after the export.
Exemple :
I have hidden a page on the dev portal, i transfer/export the change to the prod. I reloaded the cache, no change.
Sometimes it's works but it's not often
An another strange behavior is in the portal management app (DEV side), i have one multiple steps forms

In the prod side, after import, the forms is duplicated.

Maybe my process with xrmtoolbox is wrong
Let me explain what i do :
* connect to the dev environnement
* load items
* select all
* untick multiplestep form session (because it gives me a lot of error during the export step)
* retrieve records
* export or transfer
* connect to prod portal
* import
No errors during the transfer.
Then i switch to the prod portal, i select modify on the portal apps and 90% most of the time the changes are not effective.
In the dev portal, i have no sub pages.

in the prod, after 3 or 4 import, the sub pages are still here

I'm missing somtehing but what ?