the only difference with the ecutek is I think you get a limited warranty via MRT via MMS/Racetorque if you do the
TBE and ECUtek together.
Whereas Verso or any open source tune any warranty would be up to the individual worshop.
I am not 100% on the details but if you are concerned ask MMS about it. The warranty covers the things that are lost in your subaru warranty I believe. Like I said ask