If you look solely at Willis limited snaps this season alone and compare them to Love, of course many of the metrics will make you think Willis is a better QB and more capable. However, Love can and does make throws which Willis simply doesn't nearly as well - honestly some of Love's balls are likely only done by handful of guys in the league. Love's vision and anticipation is one of the best in the league (not quite on par with prime Rodgers, but getting there).
Some of the throws Love makes which I've yet to see Willis make are those throws where he has to clear a front defender and under throw the back defender to a guy - it is an incredibly hard throw to master and is one of the reasons why Stafford feasts when he is on, or Rodgers did back in the day. Most even good QBs in the league fail at this and have to shade left or right of the defender underneath.
I also cannot simply erase Willis's seasons while in Tennessee as if they didn't exist. Yes, coaching staff and roster wasn't as good BUT the throws he made were autrocious at times - that is on him. Now he's barely played over the years, even here limited. Is he a Tyler Huntley type who lit it absolutely unfire when called upon and now settled back into his back up role - one which he excels at OR is he going to be like Matt Flynn and get a chance and burn out.....or could he be like Aaron Brooks and looks promising and go on to be a starter for years but most people forget about because while good he was never great? No one knows, but all I know is GB is crazy fortunate to have Love who has proven for years now to be upper echelon of the active QBs and Willis who has played high level starting level ball this year when called upon.