I think we have got the winner. It's Intermilan. I have no doubt they can beat Acmilan. There would no home advantage here. As per the H2H, Intermilan is totally better compared to the Acmilan. they have very consistent squad who can properly attacking or defending.
Based on their latest H2H, i see no chance for Acmilan to lift the trophy. Perhaps, a miracle can make it happen only if they lucky enough. This gonna be another trophy for Inter.
Looking at this head too head record, though I share the same sentiment as you but am quite skeptical of the final outcome of the game, because this is a final not a league game, it can go either side, but by the look of things, inter Milan are the obvious favorite here considering their dominant head-to-head record against AC Milan, and their current form they are presently in, but I don't think that anything should be ruled out completely, because it's a final, anything can happen.
Then as for Ac Milan, though they did quite well again the old ladies of Juventus, but this is actually going to be a different game all together, because it's not just a different opposition, but it's also a final that comes with different motivation, but nevertheless it's definitely going to be a fascinating encounter between these two teams no doubt about that.