How to redirect into a specific page variant
Variants on the same Page always have the same URL.  The variant that is shown is determined by the selection criteria.

If the selection criteria for Variant 1 fails, it moves on to Variant 2.

If the selection criteria for Variant 2 also fails, then it will try to show Variant 3.

The only exception to the 'same URL' rule is if you have optional Arguments (that start with ! instead of %) in which case you can have a url of foo and foo/bar handled by the same page.