Compare values of two fields

While I did see an old idea for this ( ) and the only resolution seems to be the use of webhook, I'd really love to see an easy way to compare the values from two fields within a smart campaign. 

We have a few use cases for this:

1) comparing a field inputted value with other protected fields - for example, we have data that is pulled in from our legacy systems that we don't want overwritten but we'd like to be able to compare the value with a value that's customer inputted through a form submission. 

2) comparing numerical values where one field would be equal, less than, more than another field value. We could use this to compare the lead scoring from say a BI algorithm to our Lead Scoring within Marketo. 

@Hayley Iacocca‌ @Karen Vuong‌