Есть ли разница в работе кода?

public class Solution {
    static int count = 15;
    static volatile int createdThreadCount;
    public static void main(String[] args) {
        System.out.println(new GenerateThread());
    }
    public static class GenerateThread extends Thread {
        public String toString() {
            return this.getName() + " created";
        }
        public GenerateThread() {
            super(String.valueOf(++createdThreadCount));
            start();
        }
        public void run() {
            if (createdThreadCount < count) {
                System.out.println(new GenerateThread().toString());
            }
        }
    }

}

Или Run через While

public class Solution {
    static int count = 15;
    static volatile int createdThreadCount;
    public static void main(String[] args) {
        System.out.println(new GenerateThread());
    }
    public static class GenerateThread extends Thread {
        public String toString() {
            return this.getName() + " created";
        }
        public GenerateThread() {
            super(String.valueOf(++createdThreadCount));
            start();
        }
        public void run() {
            while (createdThreadCount < count) {
                System.out.println(new GenerateThread().toString());
            }
        }
    }

}