Correct, QBR is very different than passer rating (or passer efficiency as it's called in college football).
Also correct that you're in the minority for using the outdated formula created in 1973 when we had limited technology to compute advanced stats.
- Passer rating values a 7 yard throw on 4th and 12 over a 6 yard throw on 4th and 5.
- Passer rating favors taking a 12 yard sack over scrambling out and throwing the ball away
- Passer rating favors a fumble over an incompletion
- Passer rating counts a pick-6 as equivalent to an interception thrown 40 yards downfield on 4th down
- Passer rating counts a game winning touchdown as the same as a 4th quarter touchdown while down 40.
- Passer rating counts a 0 yard and a 40 yard run as the same
- Passer rating doesn't account for the level of competition at all
So again, if you're using passer rating over QBR, you're tipping your hand that you don't have even the slightest understanding about how advanced stats work.