Have a look:
https://www.sports-reference.com/cfb...an-love-2.html

https://www.sports-reference.com/cfb...lifford-1.html

Clifford's career comp% is 61.4, Love's is 61.2. On the college level these days, that's not good enough to be considered accurate. (Clifford had Jahan Dotson and Parker Washington bailing him out too.)

For comparison: Caleb Williams is 67% for his career. Joe Burrow was 68.8. Bryce Young 65.8. CJ Stroud - 69.3. You get the idea.
I think you want a guy who is at least 65% for his career, and for it to be in something with at least some pro-concepts. Brian Brohm looked great (65.8) until you realized he was running a pop-gun/Air-Raid scheme.