Why does it matter? With a gaurd rotation of Stephon, Steve, Jamal Crawford, and Nate, with Jalen, Q, and Qyntel Woods getting some minutes, you'll never find space for Lowry. Add to the fact that Brown refuses to play rookies unless they're great at defense which Kyle is only average, but only for his height which is going to hurt him in the league though it didn't in college. You're not going to get Lowry.
Secondly, you must have not watched a lot of Nate Robinson or Kyle Lowry if you think Kyle has the better shot. Kyle's shot is about 15 feet in, at best while Nate has 3 point range. Kyle's ability is to push the ball and drive, his shot is not there. Nate's shot is streaky but its more legit.