Islam forbids images in general, regardless of whether they are of prophets or of others. However at least some scholars hold the view that creating images of prophets is more serious than making images of others. The encyclopedia of fiqh for example states this: وتصوير الأنبياء أولى بالتحريم
Among the evidence cited for this is the hadith which explicitly condemns Christians for making images of righteous people (prophets are foremost among them):
أن أم حبيبة، وأم سلمة ذكرتا كنيسة رأينها بالحبشة فيها تصاوير، فذكرتا للنبي صلى الله عليه وسلم فقال إن أولئك إذا كان فيهم الرجل الصالح فمات بنوا على قبره مسجدا، وصوروا فيه تلك الصور، فأولئك شرار الخلق عند الله يوم القيامة
Um Habiba and Um Salama mentioned about a church they had seen in Ethiopia in which there were pictures. They told the Prophet (ﷺ) about it, on which he said,
"If any religious man dies amongst those people they would build a place of worship at his grave and make these pictures in it. They will be the worst creature in the sight of Allah on the Day of Resurrection."
— Bukhari and Muslim
Images of prophets can be considered more serious sins due to the following:
Drawing a prophet can be a seed for idolatry and shirk, it is possible that at some point people will start revering the depictions and may eventually even start worshiping them. It has been narrated that idolatory in the time of Noah started with veneration of the images of saints.
It is considered as disrespectful since the imagined figure will not be true to the likeness of a Prophet. The same extends to human actors depicting the Prophets in movies and serials.
Further reading (opinions against depicting the Prophets and Sahabah):