Should be identical would be my guess - same frequency Chirp coverage listed, only the MDI XDCR has a much wider 2D Chirp range for the MDI unit and I'm betting the MSI will have a low Q Chirp option soon as with v 1.610 you can use the MDI XDCR on the MSI units by XDCR Selection menu.

I'm wanting to test an MDI if I can when the ice goes - but the bonuses I was used to have really shriveled to nothing and I ain't got a $100 bill still out back fermentin' up some new moneyshine brew.