Derek Carr vs. Colin Kaepernick is talk-show nirvana and actually worth a lot of contemplation. Jack Del Rio vs. Jim Tomsula is definitely food for thought.

And overall, from management through all parts of the depth chart, the Raiders vs. 49ers could be a theme for the entire 2015 season.

With both teams opening training camp this week under new coaches, it’s natural to compare the two teams; it’s inevitable.

And, due to a quirk in the NFL schedule, the Raiders and 49ers share eight common opponents at eight common sites (they both play all of the teams in the AFC and NFC North divisions).

The 49ers and Raiders don’t play each other (they did last season, when the Raiders won 24-13 at the Coliseum on Dec. 7), but the schedules are identical for 50 percent of the season.

By the way, the Raiders haven’t had a better record than the 49ers since the 2010 season. That’s when the Raiders went 8-8 in Tom Cable’s last season and the 49ers went 6-10 in Mike Singletary’s last one, which ended, interestingly enough, with Tomsula coaching the team’s final game as the interim.

The two franchises went very different ways after that — the 49ers hired Jim Harbaugh, who averaged 11 victories in his four seasons, when the Raiders averaged fewer than five victories.

But now, the 49ers have moved past the Harbaugh era; the Raiders are beyond the Hue Jackson and Dennis Allen tenures.

So this is a good time to line up some of the key aspects of each team and take a few guesses about where this is headed.

I won’t make season predictions for either team right now; but we can all see that 2015 could be a turning point for both franchises, in different directions.

Quarterback: If you had to win a game right now, you’d take Kaepernick, who, even in a down 2014 campaign completed 60 percent of his passes for a career-best 3,369 yards and ran for a career-best 639 yards. But by late 2015, I think Carr, 24, might be the QB to take. Carr gutted out a rough rookie season without much help in 2014, threw for 21 touchdowns, and seems to have a knack for leadership that Kaepernick, 27, has yet to display. If the Raiders can surround Carr with better talent, I think he can be a star; Kaepernick can still win a lot of games, but the time for stardom might’ve already come and gone for him.

Pass rusher: This one remains clearly on the 49ers’ side of the ledger. Aldon Smith has 44 career sacks and is still only 25; while the Raiders’ Khalil Mack has enormous ability, he’s 24 and only registered four sacks in his rookie campaign last season. But Smith has missed 14 games in the last two seasons due to personal issues and a suspension and had only two sacks in seven games last season.

Coach: Del Rio, with over a decade of head-coaching and NFL coordinator experience, wasn’t the most exciting Raiders candidate in the world, but he’s almost certainly a practical upgrade over Allen. Tomsula has the one interim game and no other experience as an NFL head coach or coordinator; it’s a huge question whether he can compete with Pete Carroll, Jeff Fisher and Bruce Arians in the NFC West. I’m keeping an open mind on both guys. But if you had to pick between Del Rio or Tomsula to make key adjustments and lead a team through a long season, it’s an easy choice.

General manager: If you look at the current rosters the two have assembled, the Raiders’ Reggie McKenzie is a lot closer to the 49ers’ Trent Baalke than I thought he’d be. Really, what young 49ers players are absolutely on an upswing? Other than safety Eric Reid, defensive lineman Quinton Dial and theoretically tailback Carlos Hyde, I’m not sure if there are any others from the last several Baalke draft classes. Meanwhile, McKenzie has made some screwy personnel decisions, no doubt, but he nailed the 2014 draft with Carr, Mack and guard Gabe Jackson, and McKenzie also plucked tailback Latavius Murray and linebacker Sio Moore in 2013. Also, McKenzie’s last draft produced potential star receiver Amari Cooper and possible immediate defensive line starter Mario Edwards.