just starting

i ran the blinking light sketch with an LED in pin 13 without any resistor and the brightness was ok..the next sketch that i wanted to try was one that would fade an LED using PWM in pin 9. when i noticed the LED wasn't as bright i also made the LED blink with the same code as i used for pin 13 and the LED was still not as bright. is this something that just happends through pin 9? is there any way to make it brighter through pin 9 without getting brighter type of LED?