Let's compare Ciara and Trey's careers from 2009-present since they both released albums that year.
Ciara: "Fantasy Ride" (May 2009) Debuted at #3 selling 81K first week. Sold about 300K overall in the US.

Trey Songz: "Ready" (August 2009) Debuted at #3 selling 131K first week. 800K+ overall in the US.

Ciara: "Basically Extinct" (December 2010) Debuted at #44 selling 37K first week. 116K as of July 2013 in the US.

Trey Songz: "Passion, Pain and Pleasure" (September 2010) Debuted at #2 selling 240K first week. 825K overall in the US.

Trey Songz: "Chapter V" (August 2012) Debuted at #1 selling 135K first week. 300K overall.

Ciara: "Ciara" (July 2013) debuted at #2 selling 59K first week. As of January 2014 sold 133K.

Since 2009 Trey has had 20 Hot 100 entries. 5 Top 40's and 2 Top 10's and sold 6.5M+ singles and a certified 3X platinum single.

Since 2009 Ciara has had 5 Hot 100 entries. 2 Top 40's and 1 top 10. Ciara has 1 certified Gold single since 2009.