I'd give the edge to Johnny Manziel, but not by much. Here's how each fared in the box score.
Manziel vs. the Lions: 7/11, 63 yards, 79.0 QB rating; six carries, 27 yards
Bridgewater vs. the Raiders: 6/13, 49 yards, 56.2 rating; two sacks for 16 yards, one fumble.
Both Teddy Bridgewater and Manziel showed flashes of what we were accustomed to see in college. Each had a smooth play-action, rollout pass (Bridgewater to his right and Manziel to his left) that was negated by either a penalty or an incompletion. Manziel was able to do more with his feet, including a 16-yard scramble on third down. Bridgewater was elusive, displaying some of his athleticism to escape pressure in the pocket and extend plays and did a good job selling play actions, draws, fake tosses and counters.
Bridgewater's fumble on his first drive was the biggest mistake made by the two rookies. Left tackle Matt Kalil got beat by rookie defensive end Shelby Harris. With the pocket collapsing, Bridgewater spun to his right to avoid pressure up the middle and was hit by Harris to cause the fumble. Kalil recovered the fumble, but Bridgewater must protect the ball better in those situations. The 12-yard loss made it 3rd and 19 at the 20. They settled for a field goal on the drive.
On 3rd and 16, Manziel drew a delay-of-game penalty. Following a quick screen pass that gained 20 yards, Manziel scrambled for a first down on a bootleg play. He stiff armed a defender and gained just enough to move the sticks, but Manziel had fullback Ray Agnew open. It's a throw he has to make now rather than relying on his athletic ability.
Comparing Bridgewater and Manziel in the preseason though would be like analyzing a sparring session when the fight is less than a month away. There's some information you can take away from it, but avoid jumping to conclusions one way or the other.
I'd be shocked if wide receiver Adam Thielen didn't make the team. He's earned it up to this point and even could be used as more than just a special teamer (more on that later).
I'll go with undrafted free agent defensive tackle Isame Faciane. He had 20 snaps with 17 against the pass, per Pro Football Focus. Faciane recorded a pass deflection and brought pressure up the middle a few times to stand out along the defensive line in the second half. He's listed behind Kheeston Randall as the third defensive tackle on the depth chart. His college defensive line coach at FIU was Andre Patterson, the Vikings defensive line coach. The familiarity definitely does help Faciane's case if he can build off Friday's performance.