i have some questions about typescript.

Q1. what is the difference of this two cases?

In the first case, an object is created with properties initialized to undefined, and in the second case, an empty object is being created. I used the same code, but the results are different. I want to know the difference between these two cases

1.1) first case: i use playCode to run the code.

1.2) second case: i use typescript playground to run the code.

Q2. An error is occurring when the code does not have required properties as follows: However, in my Angular project, there is no error even if it is the same code. I wonder why.

tsconfig of my angular project

    "skipLibCheck": true,
    "noImplicitAny": true,
    "noImplicitThis": false,
    "alwaysStrict": true,
    "strictNullChecks": false,
    "noImplicitReturns": true,
    "suppressExcessPropertyErrors": false,
    "suppressImplicitAnyIndexErrors": true,
    "noStrictGenericChecks": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "strictFunctionTypes": true,
    "allowUnreachableCode": true,
    "allowUnusedLabels": true