Analyzing Funnel Differences: Event Comparison vs. Property Breakdown

Hi I noticed a behavior in one my dashboard that I'm trying to figure it out I created a funnel of 2 steps step one = viewing screen of different subscription plans step two = subscription to a plan The event of view subscription plan have a property present the layout of the screen which refers to the a/b testing layout given I wish to comare the funnel between the different layout If i create the funnel with event comparison (a=layout 1; b=layout 2) I get different result if i'm doing breakdown according the layout property Why is that? isnt it the same analysis?