Elf-san wa Yaserarenai.

both are a group of girls interested in exercising + a male trainer both series features exercises you can do personally dumbbell is more focused towards practical exercises and muscle building plus size elf is more ecchi and comedic 

both series have many female characters and have exercise tips plus size elf has male MC and include day to day life of the characters and contains nudity anitore is solely focused on cute girls exercising and the exercise tips are easier to copy 

A normal guy surrounded my Monster Girls who are always in various states of undress? Both shows also have a huge variety of creatures. These 2 couldn't be more similar. The only difference is there is no romance between anyone on Plus Size Elf. 

Contains you guessed it...different kinds of species + ecchi moments. Difference: Group of reviewers & one personal trainer. Though Interspecies Review is more hardcore 🔞 borderline sexual innuendo and Plus-Sized Elf have little less showing sexy train together along exercises. But if you like this following other then you are in for one real treat 😉👌 

They both elves, yes. Both display exercising materials. However... Allenye is very serious and always fit goes into action in combat especially others in Queen's Blade. Now for Elfuda transported to our world very unfit and less serious comedic ways and needs an personal training. So far if you like seeing one single hot elf doing some Train Along Exercises (ignoring next ep) than how about multiple cute/hot/big weighted interspecies doing same thing instead.