IMO the engine hours and HP rating are better selling points.
4.3 EFI is 220 HP and the 5.0L (2bbl) is 220 HP
Also I would take a Bravo over the Alpha if given a choice, however the Alpha is a good drive so it is not a show stopper.
1997 2400 SCR
5.7 Vortec / Bravo 2