Same but different lies at last ... most unsatisfactory (9)

'same but' is the definition.
I can't tell whether this defines the answer.

'different lies at last most unsatisfactory' is the wordplay.
'different' becomes 'me' (I can't justify this - if you can you should believe this answer much more).
'at' means one lot of letters go next to another.
'most' means to remove the first letter.
'unsatisfactory' indicates anagramming the letters (I've seen this in other clues).
'last' with its first letter taken off is 'ast'.
'lies'+'ast'='liesast'
'liesast' anagrammed gives 'asliest'.
'me'+'asliest'='MEASLIEST'

Can you help me to learn more?