SAT Physics score discrepencies

<p>So I'm only a month and a half into Honors Physics, but I decided to take 2 practice tests for the heck of it. I got a 600 on Barrons, but a 470 on Sparknotes. Wait, what? Isn't Barron's supposed to harder? Can anyone help me out with this? I just want to know how the practice tests compare</p>

<p>bump! </p>

<p>Come on, no replies? I know someone knows about the differences</p>

<p>bump</p>

<p>10 char</p>