I would say same as most succulents - good drainage (mix and pot), good sunlight (introduce slowly), good air circulation - works for most succulents. I find nothing different between two, only that 'Shrek Ears' may grow tad slower than "regular" jade. White spots/dots on the leaves may be salt deposits, usually from too much fertilizer. Repotting into non-peaty mix would be very good idea, asap. Make sure pot is taken out of cachepot after watering, until water stops draining. I see plant just behind quite etiolated - that suggests there is not enough light. Important situation to solve, especially now, with very good weather.