Differences Apilus junior and senior help please!

Hi all sorry to ask such a question (prob asked over and over), I love electrolysis and there’s still a huge market for it In my area but I trained in 1999 With sterex machine. I’ve used the cleo for the last 2 yrs but I think its a bit outdated. However my budget won’t allow the platinum pure at the min.

Can anyone help me with the main differences between the junior and the senior??
Thanks xxx