Which is fastest for a clone?

[Lisa22]

Last 90 days or full for data copied for specific tables?

[Mark Manders]

The speed shouldn't be the concern. It's about what you need on the target instance. The difference between the two will not be huge. I think mostly the last 90 days will suffice. But if you clone only once or twice a year, I would consider doing a full data clone, so you are sure all data is copied over (especially to a TEST or ACC instance). On DEV you usually need less (real) data.

[Mark Manders]

I have to correct myself: selecting '90 days' is more time consuming, because it's deleting all older data after the clone. You can reduce the clone time (if that's really necessary, because I still think it won't matter that much) by excluding large tables.