First Gen Hydrogenated amorphous silicon had a similarly low output, but around the same time cadmium telluride was at 160w/2m^2 and gallium arsenide was at 450w/2m^2 (in outer space).
Also idk if it's fair to compare this Gen of piezoelectric generation to first Gen PV, since piezo has been around for a while

Not sure if anyone has studied it across different energy sources, but you might have better luck searching "generational improvements" or "efficiency over time" instead of energy production lifecycle. That sounds more like how much energy would be expected to be produced over the lifetime of the product.