Their last regular season stats:
Ben (age 21)- 12ppg, 3rpg, 2apg, 1spg 44% fg, 36% 3's
James (age 24)- 10ppg, 4rpg, 2apg, 1spg 43% fg, 33% 3's
So in regular NBA minutes, Ben was as or more productive than James. If you just want to make it about a few preseason games, Anderson is putting up 5ppg, 1rpg, 2apg with no defensive stats and is shooting 39% from the floor and 44% from 3. It should also be noted that his percentages are all driven by last night as prior to that game he was shooting 20% from the floor and less than 10% from 3. Ben, who we agree has looked bad this preseason, is putting up slightly more points and steals on worse shooting %.
Even if you ignore the fact that Ben has been more productive at a younger age than Anderson and decide to focus on 5 preseason games instead, Anderson has basically played slightly better d while having one hot shooting game and beside that done nothing on O. I get he looks more comfortable on the floor. He should as he's played professionally for longer. I still take the young guy that produces about the same or better now and has significantly more upside.
Now, when Ben isn't on, I'm glad we have other options to use. But we have so few pieces that could develop into a part of a actual contender rather than a maybe playoff team and Anderson isn't one of them. Ben is.