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#Bash + GNU utilities, 58

f()(tr -dc \ <<<${@^^}|fold -1|sort)
f $1|cmp -s - <(f $2)

#Bash + GNU utilities, 51

f()(fold -1<<<${@^^}|sort)
f $1|diff -qBw - <(f $2)

• Define a function f() which:
• ${@^^} converts all parameters to upper case
• fold -1 splits chars - one per line
• sorts lines
• call diff with -q to suppress full diff output and -Bw to ignore whitespace changes

#Bash + GNU utilities, 58

f()(tr -dc \ <<<${@^^}|fold -1|sort)
f $1|cmp -s - <(f $2)

#Bash + GNU utilities, 58

f()(tr -dc \ <<<${@^^}|fold -1|sort)
f $1|cmp -s - <(f $2)

#Bash + GNU utilities, 71

f()(tr -dc '[:alnum:]'<<<${1^^}|fold -1|sort)
f "$1"|cmp -s - <(f "$2")

#Bash + GNU utilities, 58

f()(tr -dc \ <<<${@^^}|fold -1|sort)
f $1|cmp -s - <(f $2)