<p name="equal">equal</p>
 <p name="equal">equal</p>
<div name="different">different</div>
 <p name="equal">Почему этот не подсвечивается ? equal</p>

<div name="different">different</div>
<div name="different">different</div>
 <p name="equal">equal</p>
<div name="different">different</div>
<div name="different">different</div>

 <p name="equal">equal</p>

p[name=equal]:nth-of-type(2){color:red;}
p[name=equal]:nth-of-type(3){color:red;}