I have experience with both my RV's with both units.
The main difference is the trio unit is upgradeable, should you choose to do so at some time in the future, to the more advanced features. As a push button AH, they are identicle. But with the advanced feature set in the trio to include AS and VS climb/descent, auto trim adjust, alt preselect and so forth, then you have a whole new ball game with the Trio.
Best,