They offer a better warranty 2 yr vs. 1 yr for GMPP. And they are about $200 dollars less than the HT383 (from Scoggin Dickey). The only difference between the two is that the HT383 uses a special 3.8" forged crank whereas the Smeding engine uses a nodular iron 3.75" crank. But a forged crank isn't necessary until above 500hp and 6,000 rpms, and the smeding engine uses better pistons and forged rods. In my opinion its a better built engine for the money.
I hear that smeding is very popular among street rodders in Cali, but I was hoping someone here had heard of them.