BG7RUF There are no other differences. The frequency range gap exists on the 160m, 80m, and 60m bands. The daytime-only versions of the equipment cannot transmit on the 160m and 80m bands, while the daytime-only versions cannot transmit on the 60m band. The frequency ranges are consistent for all other bands.
The specific frequency differences were previously discussed internally by enthusiasts; here's a reference to that discussion:
160m
JA 1.8-1.875, 1.9075-1.9125
By 1.8 - 2
80m
JA 3.5-3.58, 3.599-3.612, 3.662-3.687, 3.702-3.716, 3.745-3.770, 3.791-3.805
By 3.5 - 3.9
60m
JA - Missing
By 5.351-5.366