Hi Jon!
I don't have an A:B comparison as I use generics for face light (and specials, gobos etc) and LEDs for back and side light colour washes. I don't have good enough quality LED fixtures to use for face and hence neither are they colour calibrated. So in that sense I'm not trying to match tungsten+gel to LED+palette, I'm using the colour palettes to pick a convenient colour for LED fixtures rather than a match to conventionals. That said, the wider filter range is nice - but the colour on stage is not really much like the colour on the touchscreen swatch. My LED fixtures tend to be RGB(CW) or RGB(WW) or RGBAW - i.e. no "filler" colour LEDs like lime etc that you get in a high-end LED fixture.
This could be unrelated but I'd have to say the yellow shades I could achieve on my cyc seemed much better than I remember from before - I believe a decent yellow can be hard to achieve from the simpler RGB+W fixtures which I have (in this case my cycs are Stairville RGB(WW) floods).
As mentioned above I did also use the new "Temp" (colour temperature) feature with a Philips PL1 LED profile (probably the "highest quality" LED I have) which as a backlight worked nicely when working with a tungsten Source 4 from the front - I was able to warm-up the PL1 a little to blend a little better with the Source 4.
So probably not the data you're really looking for, but that's all I've got to offer, sorry!
Regards, Kevin