Or even shorter... Albeit about 3 times slower on long strings and 30% faster for short... 
sub comp {
    local $_ = $_[0] ^ $_[1];
    return s/([^\x00])\1//g==1 && !tr/\x00/1/c;
}

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T I M T O W T D I

In reply to Re: Re: Detecting transpositions by Cine
in thread Detecting transpositions by BrowserUk

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