Having owned a Case tractor with the two range transmission, you will notice a huge difference with any other tractor! On my Case, the low range was too slow for mowing, and the high was good for nothing except for high speed road travel. Remeber, that Case has a hydraulic transmission, not a hydrostatic.
My BX had a 2 range transmission, and my B has a three range transmission. I use low for loader work, medium for mowing, and high for transport.
Will