I appreciate your attentive listening, but I cannot discern a similarity between the guitar opening on either song. The Benatar song is sufficiently dissimilar in that it:
1. Is in E-flat minor while the Quarterflash song is in B-minor.
2. Has a prominent guitar solo that overshadows the rhythm guitar that I _believe_ is what you are focused on when trying to draw a similarity to the Quarterflash song.
However, I stand to be corrected! It would be really useful if you provided specific timestamps in each video for comparison. You can right click on the video while it’s playing and select “Copy video URL at current time to do so”.
Also, the quarterflash song is significantly faster.
The part in the Pat Benatar song is the very beginning of the song.
Changing the key does not affect this.