I can't be sure. I have looked at them as well. I bought both of mine at Sarco a few years ago. I believe the hi-power is a later model. Mine have the older classic stocks. schnable short forends, slim but stocks and wrists. The 46 has a "bag" type rounded grip. Both are untapped for scopes.
Barrel band with forward swivels. Two leaf rear sights. The barrels are about 25 inches and nice sporter taper.
I believe the 46 (96 action) is the lighter of the two. I still want to find one in standard 8mm to go with them.