The most noticeable thing is the larger field of view with the 1/2" chip. There are likely differences in many characteristics due to different chips being used. The JrPro can be ordered with an EXview HAD chip as well. User variables such as location, temp, filters, focal ratio, type and aperture of telescope, software used, different monitors, cables, etc. make unbiased comparisons all but impossible unless someone has both cameras and even then there are many variables to control. Generally a larger chip with more field would be preferred so less aggressive focal reduction would need to be used or similar reduction results in a larger field. This makes framing easier, goto's easier, and tracking less critical. These are not trivial when using these small chipped cameras.