Gotta admit though, saw some Beardies at a pet store and they were so curious about me! They were soooooo cute!!!!!!!!! I'd love a frilled neck but theyre only for advanced people apparently.
Beardies get between 45-50cm, blueys 60cm (but they vary depending on species) For an adult beardie the recommended enclosure size is 4x2x2 foot... not sure about the blueys, mine's in a 5x1.5 foot (lxw
Blueys are ground-dwellers so no, beardies like a bit of height though, some tend to enjoy sleeping up higher.
Blueys generally sound like good pets, but as mine is in the minority that does get a little fiesty and unsociable it's hard to say. It appears that while a bluey will get to the point where they have had 'enough' of all the attention, a beardie just loves a cuddle and seems to benefit from extra attention!
In the end it's up to what you want, but if you're looking for a little pal then a beardie is way easier to get into a 'toilet trained' routine