how is Advance Expression in Options & Variants different from Advance Selection Logic

Here is a short summary of the advanced selection logic:

With the advanced selection logic you can do the following that you can’t do with O&V:
- Create a configurable structure supporting Configure to Order strategy
- The logic allows to create a Windchill part if it doesn’t exist, you don’t need to have a 150% BOM.
- You can define Parameter and case table constraint
- You can drive the number of occurrences of a component with the logic
- You can drive the selection of a component by a parameter
- You can combine option and variant and advanced selection logic
- Generate product variants

hope this help to understand the differences with O&V.