Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)
No, because your iPad doesn't have a mobile number. If they send it to your email then both iPhone and iPad get it. To ensure that it both works go to Settings>Messages>Receive At>Caller ID> then set that to your email. Do that on both devices.