I am not patient enough to do painstaking testing on what I can already see are very minor differences. I prefer to use my scarce time to make pictures which are "hang worthy"!
Since my last post I have also converted my Beseler 45 enlarger to an LED source without any permanent damage to the existing colour head. I have printed the same negative now on Durst and Meopta (both condenser/bulb) and the Beseler and Durst with LED light source. I can see no significant differences that would cause me to abandon LED in favour of traditional hot light sources. I mentioned above on the Durst conversion the contrast seemed to be a little higher using the same filter but not serious enough to be uncontrollable through moving up or down in grades.