PDF. Else setup XDP to the same page size and do some judicious copy/paste of the text, reset it, import the ID assets (images, vector, etc.).

I would go with the PDF first. PDF/X-4 output may hold the colors better in any natively drawn ID assets, though you may receive a warning doing the import. The highest PDF format XDP supports (1.7 I think) may well be the best option for the export out of ID.