this question is not that simple...everyone has a different opinion on wat they feel is better...its like asking "wats better a M.Benz or BMW?"...u get to many different opinions...either u go with the remora or the octopus..you'll be happy..i don;t have any experience with the remora but i do have a aqua c ev-120 skimmer on my 90g mixed reef..very well made..not made of cheap plastic but thick arcylic...so im pretty sure the remora is made the same way..