Have a train already and love the smooth look it gives me. The only issue is if I keep moving in I'll eventually reach a point where it won't make the corner. I just got my hands on a Shred/It and was hoping it would fit the bill. I'm hoping to use a similar drill and let the differences between the balls dictate reaction.

The Shred-it, after reading the numbers, finishes, and cover strength, is going to be a touch longer due to the stronger cover and finish of the Train. The Shred-it is close to the train as far as numbers but the finish and the weaker cover get it to push longer. With that said, the Shred-it should be close to what you are wanting. However, i would look for a better replacement. Maybe The Look or the Freight Train, as they are going to give you what you more of what you are looking for. As a matter of fact, that is what the Freight Train was designed for. As you are moving in, one of those 2 balls. If you're looking for something weaker, then the Shred-It will come more into play.

Have a train already and love the smooth look it gives me. The only issue is if I keep moving in I'll eventually reach a point where it won't make the corner. I just got my hands on a Shred/It and was hoping it would fit the bill. I'm hoping to use a similar drill and let the differences between the balls dictate reaction.

Righties would understand where you are coming from especially in 5 man leagues where lanes transition and heads blow up....wrongsiders not so much.

I believe you are headed in the right direction with your hypothesis.  Train is a very smooth reacting ball with slower response time and rolls hard.  Shred-It a bit more backend and harder off the spot with faster response time.  This is what you may need.  Slightly more length and faster response time or add axis rotation is your fix for this.  Also look at ball speed.