Haven't run a 232, so I can't comment on that.
All time best plug has been a classic 602, but I think it's more related to the action than the glow properties. Can't beat the RVP2 for its adaptability tho. It's basically always matched to the conditions... likely why Rob made them that way. But I also had a plug in Haida Gwaii that was a killer, and it was 158 with a pearlescent body (gold hue). So, conditions, conditions, conditions, but really it all comes down to the plug's action...
Personal plug mantra. Any plug, as long as it's a 602.