So two QB's with comparable stats, one plays like Dr Jekyll and Mr. Hyde with great games followed by dumpster fires, and the other is playing with Tom Brady like efficiency. Now here's the question, what causes this?

Mr. Bipolar: https://rivals.myfootballnow.com/player/748
Tom Brady Jr. : https://rivals.myfootballnow.com/player/505

Still catching up on 4.5....and very much open to correction on this.....BUT.....
If a Coaching/GM decision is that tight to bring it to the open forum, then....(without looking at stats)...go with speed if attributes are too tight to call.

Oh no I'm already rolling with Tom Jr. I'm just curious as to why there is such a difference when they have similar attributes, and play with the same gameplan and supporting players,

Jekyl and hyde has a current 73 pass accuracy with potential for 83.

Brady jr has 98 pass accuracy.

I think its as simple as that. A QB with a pass accuracy 50 or below will have games where he is 1 for 35 passing with 5 ints.

70 is the floor for a starting QB and J&H is just above that threshold but even his potential is still 15 points below Jr.

If you have been substituting them, then the DOtB nerf is playing a role.

If Jekyll starts, he plays a decent game. Brady comes in as a sub and is not too badly affected, because of his high accuracy.

If Brady starts, he plays to his full potential, and Jekyll coming in as a sub gets destroyed.

Tom Brady Jr. comes from a D1 school... ;)

I am beginning to ponder that LOD and FOV are as important or nearly as important as Release. Definitely FOV with RBs being often an endgame for the pass attack in 4.5.

ACC is far and away the big deal with QB. However, as with any key stat within a position, not always the most reliable (I think the pass catch rating is way messed atm, in every off position, eg). Parabolic ratings definitely need some tweaking, and it's not the math, me thinks. I digress.

BTW: In the current enviro - a lotta shorter passes for hopeful YACs regardless of S/M/L, arm strength is something to have, but not something to overvalue atm - everything is backfield and TE's with a hopeful breakaway - esp with DBs knocking everything smaller than a 12 inch plate out of the air.
On that note, gonna be fun when an elite WR matters again....
All my two cents.

part of the long term strategy for mfn is planning/drafting for eventual fixes with a weight on the current release, while drafting/Fa-ing for now. I find it fun. I also find the roadmap to be helpful for this "prepping."

I rarely even look at release or LOD in 4.5.

I think it is the math . . . DOtB seems to specifically target accuracy.

If it's hyperbolic, I picture it with 100 accuracy as positive and parallel to the X-axis, and 50 (totally ineffective) as negative and parallel to the Y-axis. The greatest curve (where you see actual performance differences) is at around 75. Say DotB is a 15 point penalty . . .

Brady starts at 98, and subs at 83. Not top performance, but still above the curve and effective. Jekyll starts at 73. Not great, but his other stats compensate. He subs at 58, where half his completed passes would be to the opposing team.

I don't claim my mental picture is completely accurate, but I hope you get the idea.

Avoiding pressure helps with accuracy . We played Estes last season and was able to Talley some sacks and pressures . This season the AI faced Allen and couldn't get any. The defense average two a game this season .

Qbs need to get rid of the ball before the heat comes. Pressure makes good qbs look mediocre . Much like the power/ effect of DotB. Neither of those guys can scramble but Allen moves better within pocket . Not only is he more accurate in general , but he's exponentially more accurate in those senerios .

The faster a qb is traveling while throwing the ball the less accuracte he becomes. None of them really get going in 4.5 to see that effect , but I had some mobile qbs never really ever taking a sack through 100's of pass attempts , but not cause of the oline but the recievers are great.

Almost every pass is under 3 seconds for 4.5. That would favor the game managing qb with quick recievers . Not that Estes isn't good enough but the weapons are not quite there to make up for the oline and pressure . Buying a bit more time would allow him use the FOV, but forcing the ball in to talent with a lower FOV is viable in 4.5. Especially with high accuracy , arm, and release . Experience helps with FOV.

A team I had in nffl had some bad qbs but a bunch of talented fast receivers . A old mediocre qb in fa made them contenders. 86 accuracy most other stuff below 60. This season a user went with those lower accuracy qbs in the 60s. All qbs are doing well in pre-season with an average oline. It's the recievers

The Bulls oline is not the best pass blockers imo, but their wrs can create some space. (especially TE). With more of those pressure senerios I think this team would need at least a mobile accuracte qb. I don't think one is better but one definitely fits 4.5 better , and I don't see 4.6 changing that model too much.