Mobile Pentium or Celeron

Hi,the celerons are desktop celerons aren't they ? do they heat up ?
Should people go for the mobile pentiums everytime ?
Thanks

you should have no troubles with a mobile celeron....im not sure if they are the exact as desktops....well, i know they arent quite the same esp with the Celeron-M. go with the p4 if you want a little more power; otherwise you should have no troubles with a celeron.