OpenCV 3.1.0 Cascade Classifier detectMultiScale provides inconsistent results on different machines

I am using Cascade Classifier detectMultiScale to detect text in an image. I am testing on two different machines whose configuration is listed below. The results generated for the same images using same trained xml are different. The output vector size is same always but the Rect x,y,w,h are different. Please help me figure out the reason behind this or if anyone has any pointers for similar issues faced. System 1: intel Core i3, Windows 7 Professional, VS2013 Express Edition, OpenCV 3.1.0 System 2: intel Core i5, Windows 7 Professional, VS2013 Professional Edition, OpenCV 3.1.0 I am doing other pre-processing operations and have for sure figured out that all is well until detectMultiScale step