I agree with Cheri's points - very well put. I own the 12x12x18 inch (30x30x45 cm) version from both vendors. Neither is fruit fly proof though - they both need extra sealing to be made fruit fly proof. One significant difference is that the Exo-terra has a higher "lip" under the door - this means that you have less room in the Zoo Med for an aquatic base, or false bottom.