Totally different ball park , Aura is a umbrella tag for many different systems / soloutions , i honestly suggest you find a BP or use the university / support site to understand the difference
its mostly linux based cmd line programming , ASA /putty will access ACM / Definity but that is server admin you then need a gateway (genrally) then you have CMS ,AES, One X (not the same as one x portal in IPO) , Look at Avaya media and server implementation courses for installation or on the university look at APSS for UC , at that point you will grasp the difference.
APSS (SME)
ACSS (SME)