Difference between NI GPIB-USB-HS+ and NI GPIB-USB-HS

I would like to know the difference between GPIB USB HS+ and HS (without the +)
Seems to me that the HS has no on board GPIB analyzer but has a GPIB ASIC Chip.

Main difference would be the speed, which is strange, the HS has a faster speed than the HS+.

Anyone using or has used before both of these? Is there any difference from user POV?