Ok I've give this a bit more thought and I MAY be wrong (I know... there's a first time for everything). It's all in the details I guess. I was thinking of my own experience where I replaced a 46FX with an ASP .70. Flight times and flight performance were very similar.
Now with a direct comparison of the anemic 46LA to ANY engine with a displacement larger than .40, yes, one would expect more power.