Bolden is at least 6'10 or 6'11. The mcd AA he was towering over Bam and Killeya-jones. He has a very long wingspan that makes him a great defense present inside. That's why he would fit beside Harry Giles because he is more of a True Center.
Yes, I'm not sure about the word "towering" when describing his height relation to Killeya-Jone -- but Bolden certainly looked every bit of 6'10. He was clearly a little taller than Bam and appeared to be about as tall as every center out there. He also looked to have long arms, and used that length to make some pretty impressive blocks / quick dunks. I've been a bit skeptical of Bolden from what I had seen in highlight tapes, but his movement, size, activity impressed me. He looked way further along in the McD AA game than Jeter did last year.
Amile, by contrast, is not only not 6'10, but I've personally never bought him being listed at 6'9. When you see him standing next to teammates over the years (e.g., Jabari Parker, Rodney Hood, Ingram), Jefferson looks to be 6'8 at most --- and with Jefferson, part of the problem early in his career was weight. Now, as I've said before, I bet Jefferson starts either way. But I do think there's clearly a noticeable size difference between Jefferson and Bolden.