Anchors between two concrete blocks - concrete breakout in tension

[Keystation]

Hi, I am a young structural engineer. I am calculating for concrete break out strength of anchors in tension. The vertical black lines between the concrete are the anchor rebars. The situation is depicted in the picture above.
Do you know which concrete is more critical? Rebars are embedded 4 ft into concrete 1. 1 ft into concrete 2. My colleague and I think the concrete 2 has to fail first before concrete 1. However, confusion is that since concrete 1 has smaller edge distance it has smaller failure area meaning less capacity.

 

[driftLimiter]

Check them both its the only way to know.

 

[EngDM]

As driftLimiter has said, there's really no rule of thumb for these things. If they were the same embedment then sure you can compare apples to apples, but in your case there's no real comparison aside from analytically.

 

[Tomfh]

If it’s embedded 4 feet into concrete and close to a surface 1 it’s more akin to regular stress development check eg bottom bars in a slab.

I’d be checking concrete 1 on that basis.