Cresteds are much simpler than the likes od bearded dragons in many ways.
1. Feeding: as you know since this is a bd forum, they require greens, and live insects of various different species. They must also have their feedings dusted with calcium/multivitamin powder.
Cresteds on the other hand.. CAN be fed small crickets/dubais but you have the option to use 100% meal replacement. Allen repashy's 'repashy' is a powder you simply add water to, stir and done. This powder has all the vitamins and nutrients they need. Those who feed crickets only do it 1-2 times weekly or monthly as a 'treat' and use meal replacement the other times. Also most put food in the enclosure one day, then take it out the next, then back in the day after on a cycle. I don't know if that is required or personal preference however.
2. Heating: bd's require a hot side of 95-110 depending on the age and a cool side of 80-85 in the day, and temps can fall to as low as 65 at night w/o needing other heat.
Cresteds require no extra heat besides room temperature. They thrive best in 72-78 6, but will tolerate in the mid 60's. Temps over 85n run the risk of killing them.
Lighting: bd's need the typical heat lamp to keep up the 100s temperature, as well as a
uvb bulb to help prevent mbd and other issues.
Cresteds require no lighting at all as they are nocturnal animals. You can use coil/compact uvb bulbs to help light up your tank in the day, or to help any live plants that may be in the viv grow, but iit is not neccessary.
Humidity: beardies like very low humidity so it is recommended to not mist their tank.
Crested geckos require a higher humidity. 80-100% humidity after spraying in the night time(as they are nocturnal) and then allowing a 'dry out' period where it can get into the 50% range for humidity before you would need to mist again.
Basically spraying heavily once in the evening, and then once in the mor, allowing it to dry out inbetween is acceptable in most homes(this ofcourse depends on your areas natural humidity).
Enclosures:
Bearded dragons are not bigclimbers, so they do not need a very tall enclosure, however they do get 20" range so the smallest reccomended tank here is 36x18x18, although many use a 4'x2'x2' enclosure for 1 adult.
Cresteds prefer to climb and therefor need more height than width. An 18"x18"x18" can comfortably hold a pair and possibof cresties as they only get around 8-10" long. They need more hiding spots, vines and a substrate that holds humidity when older, as with beardies paper towels will suufice for babies/subs
The big difference in the 2 with enclosures is size to start with. A beardie will do fine in a 40gal breeder its entire life. From what I have heard and use with my crestie is that size matters. When small, it is better to use a small enclosure, such as a kritter keeper so that way it is easier for it to find its food and such till they get bigger. Than they can be put in bigger tanks.
That's all I can think of right now, any more questions feel free to ask.
