LED backlighting is still used in display panels, though I don't think any CFL technologies were ever used. I could be wrong.
The easiest ways to compare CFLs and LEDs would be to plug them through a Kill-A-Watt meter. Or just measure their temperatures after an hour of operation; if you assume they are both rated reasonably close in terms of brightness or candlepower then hotter means more energy wasted in non-visible radiation spectra.