As fatdog mentioned, the 92 will be a stronger action if you are wanting to go T-Rex hunting with your loading. However, the 1873 action will be smoother and faster than the more complicated 1892 action. I could cycle the action of my 1873 all day. Cycling the action on my 1886 gets tiresome after a bit*. The 1892 is a scaled down 1886 action.
Between the two, for what you are wanting to do, I would go with the Uberti 1873.
*But my shoulder would give out shooting The Government load long before my lever arm. :-)