The physique in Echo v novels (those in town Echo) are different, in TSR people are the most similar to humans: 5 fingers per hand , men genitals. (well, weird part is that the legs and paws in TSR are actually animalistic, but that s not the point here, you know what I'm saying)
on the other hand in Echo (benefits) we can clearly see the whole animalistic physique: paws instead of hands, paws instead of foots and the most important full animalistic genitalia. I know that from CGs its hard to tell that their whole body resembles more animal than human, but Chase spent some time during inner monologues when he was describing his friends physique and again, dongs are different in either games kek
Finally Arches and again full animalistic physique, however characters have 4 fingers like in cartoons.
To summarize I wouldn't mind the differences in how people body are build in Echo bc it just depends of design creators choose.
Edit: I made extra effort and found Duke spirits in echo and arches (he is the only character that is in both games so far) and he has 5 fingers in Echo and 4 in Arches what only confirms what I wrote :)