So many of the positional battles depend on the outcome of the other positional battles.
For instance, if we start Dalembert and Thompson, then that's not a lot of offense, and I am thinng Casspi's offense is needed in that linuep. On the other hand that is a TON of rebounding, adn when combined with Reke maybe Casspi's superior reboudning isn't really that important.
On the other hand if we for instance started Cousins and Landry, then combined with Reke that is a lot of offense, and a lot of shots being taken, and all of a sudden Casspi's offense isn't as important, and might even be a distraction if he does his non-passing thing, so maybe Donte fits better there as the roleplayer. In addition that's a weak defenisve frontline, and Donte might be abetter fit next to those guys as well for that reason. On the other hand, any starting lineup invoilving Landry leaves us a man short on the glass, so Casspi's edge there might be handy.
etc. etc. But just in general I'm not really sure its truly a head to head thing between those two guys given there spot a ways down the pecking order on the team. Who gets the nod could well end up depending on who the bigs are next to them, and to a lesser degree who the shooting guard is as well.