A heads-up river situation

[Danenania]

Since I keep telling everyone to raise the river here's one on that topic. It's folded to SB who you have no read on. He completes. You raise KsJs.

Flop Ts6s3h. SB checks, you bet. SB calls.

Turn 8d. SB checks, you bet. SB raises. You call.

River Kh. SB bets. You..

Is this an easy raise? What if instead of KJs you have A4s and the river is an A?

[ISF]

I would raise this, but id also fold to a threebet.

[Michael Davis]

The ace raise is tougher but still correct. The K raise is automatic.

-Michael

[Trix]

Both seem pretty standard to me against an aggro player in a blindwar. The A may scare some players into checking unless they can beat it which makes that one closer than the K, but probably still good against most in 10/20.

[Danenania]

Are you folding to a 3-bet in either scenario against this unknown?

[Michael Davis]

Instinctively I'd fold the ace because there's no way he's trying to bluff me off of that. The K I probably call but should fold.

-Michael