I think the Nautilus and Cleito are polar opposites - well, more or less. Bear in mind that liquids/flavours which work well in one might not be so hot in the other.
Not sure if it's along the right lines, but if you stick to (max) 50% VG liquids for the Nautilus, you may find they taste a bit... more. I seem to recall reading that higher PG/MTL liquids sometimes use more flavouring, just as they often have more nic. Please don't take my word for it though.
If you're careful, you can get a pretty warm vape from the Nautilus.