Today things has really change in the canadian crime scenes.

In the 90s and 2000s no doubt every crime groups in montreal were stronger than there counterpart from toronto (except asian groups)
In the 90s and early 2000s, montreal mafia were stronger than the italian crime groups from ontario.
The bikers were stronger in Quebec than Ontario.
Even during the 90s and early 2000s, the street gangs scene of Montreal was stronger, more organized and more violent than the street gang scene from toronto.

But now, I would say only the biker scene from Montreal is 100% stronger than the biker scene from Ontario.
For the mafia, I don’t know, but the war this last decade as really weakened the montreal mafia.

For the gangs, the toronto scene is really more violent than the montreal scene. And I think the guys from toronto are making more money.

So only the biker scene of montreal is way ahead of toronto