The biggest difference, and of EXTREME importance if you're installing it yourself, is that the Americast tub weighs about 110 lbs. vs. 350 lbs. for cast iron! I recently installed an Americast tub & I think it's great.
Summary: This impressive and accessible waterfall on the U.S/Canada border is the highest waterfall in Minnesota. Definitely worth a visit. The High Falls of the Pigeon River, also known as Pigeon Falls, is on the Minnesota/Ontario border, right off of Hwy 61. The Falls can be reached from Grand Portage State Park or Pigeon River Provincial park. On the Minnesota side it is a short walk to the falls on a pathed trail.
The Big Sandy River is a tributary of the Ohio River, approximately 29 miles (47 km) long, in western West Virginia and northeastern Kentucky in the United States. The river forms part of the boundary between the two states along its entire course. Via the Ohio River, it is part of the Mississippi River watershed.