Difference between ECS & built-in physics

[modern thunder]

I'm trying to move my physic based game to the ECS. And ran into a problem with the difference in physics.
To give you an example, I put two identical spheres and boxes with the same parameters. But they behave noticeably differently
⚪ White sphere in built-in world
🟣 Pink sphere in ECS world

How can I solve this problem? Maybe there are other ECS Physics settings

[hollow perch]

Can you show physic shape and physics body?

[reef minnow]

they're different simulations, you shouldn't expect them to behave identically

even if you compare the 2 ecs physics, unity and havok, they behave differently

[modern thunder]

PhysX and Havok - different physics engine. But built-in physics and ECS physics - same physics engine - PhysX. it may work similarly.
I found some difference between built-in and ECS: default friction (.6 vs .5 ecs), default friction calculation (a + b) / 2 vs sqrt(a * b) ecs, limit of vertexes of convex shape 128 vs 32 ecs (native PhysX limit - 256).
I suspect there are more differences and hidden settings.

[reef minnow]

But built-in physics and ECS physics - same physics engine - PhysX

esc physics isn't physx, completely different simulation

i actually think unity got havok devs to write the original version of unity physics or something along those lines