The difference lies in their careers to this point. Marble is leading 15th-ranked Iowa this season. Turner is prepping at the New Hampton (NH) School striving to reach that status someday.
"I think we have some similarities," the 6-foot-7, 185-pound Turner said. "Marble (6-6, 200) is a great player who will be very successful at the next level. I hope that I can accomplish some of the things that he's been able to accomplish at the college level."
One area where Turner exceeds his likeness is on the recruiting trail, where Marble was undervalued. The New Hampton School junior reports scholarship offers from Iowa State, Boston College, Arizona State, Massachusetts, Stanford, Pennsylvania, Princeton and many of the MAC schools. He said Michigan, Wisconsin, Iowa, Vanderbilt, Gonzaga, Purdue, Virginia and Florida State are showing him consistent interest.
"At this point, I haven't narrowed it down or put too much thought into schools standing out," Turner said. "I've just been focusing on the season and keeping an open mind to all schools."
Turner played three seasons at Warren (MI) De La Salle High before leaving for New Hampton last year and reclassifying into the 2015 Class. He's been running AAU with Dorian's Pride.
"I've been (on visits) to Michigan, Michigan State, Boston College, Xavier and Iowa State," Turner said. "As of right now, there aren't any scheduled visits for the future. Once the season is over I am going to sit down with my parents and Coach (Peter) Hutchins to figure out which direction to go in as far as visits."
Iowa could very well be one of those destinations. Turner is high on the Hawkeyes.
"Iowa has been recruiting me for a long time," he said. "Coach (Andrew) Francis calls me all the time to check in with me. We talk about more than just basketball. He calls just to talk about life sometimes. We have a really good connection.
"I've spoken with Coach (Fran) McCaffery multiple times. The coaching staff is great. They've been out to see me numerous times.
"I really like the way they play and how they let their guards get up and down the court. They're a hard-nosed team that plays tough D and rebounds the ball well. I like Iowa a lot."
Marble graduates this year. McCaffery is searching for a player with his skill set. Turner fits the bill.
"I'm a big, versatile guard that can play multiple positions," he said. "I can impact the game in many ways whether that is scoring, rebounding, facilitating or defending.
"I'm trying to improve every aspect of my game, though. Also I spend a lot of time in the weight room trying to get stronger."
Turner said he played with and against Marble in open gyms in Michigan last summer. He knows Iowa sophomore point guard Anthony Clemmons (East Lansing) as well.
"They are both very good players," Turner said.
Turner said he plans on majoring in either business management or communications when he gets to college. He's in no rush to figure out where that will be.
"I'm going to go through the last couple games of the high school season, the spring AAU sessions and then go from there," he said. "If my family and I feel like it's the right time to decide then, we will. If we feel like we need to continue through the July (AAU) open period, then that is what we will do. But as of right now there is no timetable for my decision."