More often than not a Black Bear attack is a mature male boar. The scary part is in a poor year( food wise) they will view a human as a food source. That and the fact that they are naturally a smaller bear when they do attack they hold nothing back. Attack rates are relatively low but mortality rates of those attacks are extremely high. Last number I heard was 62 of the last 67 attacks were fatal. Often looked at as a harmless creature nothing could be further from the truth. I have a book somewhere entitled Bear Tales from Alaska and Beyond. The author escapes me now but it is a collection of short true stories cronicling bear attacks. Once read the bear woods never quite feel the same.

To awnser your question more directly yes mature large boars are more aggressive. I have not hunted my bait hard this year as I can tell from the bait site the boss has not been in yet. The rut will bring him around this last week of May and if lucky he may give me one chance. When they (mature boars) come you know because the boss man destroys everything. Last year he tore 1/8" steel plate around lag bolts that were holding a molasses tank to a spruce tree. Nothing short of impressive.