If you still have your old mouse pad you can test them both in the DPI Analyzer and see if there is an actual difference.
If there is it's most likely one of the pads causing the sensor to not register movement properly, usually due to the distance between the sensor and the surface. A softer pad will have a different distance than a hard pad.
And if your mouse software supports it, you might need tune it to the new surface. I'm not familiar with Xtrfy and if they even have a software suite, but on Logitech this is done by using the Surface Tuning option.