#include <iostream>
#include <thread>

class MyClass {
public:
    MyClass(int val) : val_(val) {}

    int val_{0};
};

void threadFunction(MyClass myObj) {
    // do something ...
}

int main() {
    MyClass obj(42);

    std::thread t1(threadFunction, obj); 
    std::thread t2([=]() {
        threadFunction(obj);
    });

    t1.join();
    t2.join();

    return 0;
}

In thread t1, I called threadfunctiondirectly whereas in thread t2, I put the call of threadFunction in a lambda.
Are these two ways of thread creation equivalent?