They're both more left leaning anarchistic movements than their predecessors, but that's just the economic swing of the pendulum causing politics to inspire strange bedfellows. My enemy's enemy is my best friend and people will adopt whatever rationalization is required to make it happen. Until they embrace the economic factors driving the need for their existence we'll just see more of the same in the future as they change ideology to suit their needs at the time.
For example, blacks are notoriously conservative about sex and often more homophobic than other groups, yet BLM has embraced them all. You work with whatever you have to work with and these movements are not so much about promoting social change as they are about making political statements and attempting to get anyone interested involved. Executing cops in broad daylight is something others might do on their own, but not exactly what you might call a political movement so much as a revolutionary one.
For feminists to turn that radical they would require some sort of actual chance of gaining some concessions which is a stretch to say the least at this point. Blacks have already begun to riot and execute cops and that trend doesn't look likely to stop and having a peaceful protest organization like BLM means they have somewhere to connect with one another. As happened with Occupy Wall Street I expect the FBI is already attempting to infiltrate them, while the feminists they couldn't care less about.
Same old same old with the people with more guns telling everyone what their money and labor is worth, while others fight back hoping to win a few meager concessions. The difference this time is that the Pentagon has been working on nonlethal weapons and robotics, congress has already given them the legal authority to round people up like cattle, our constitutional rights have been indefinitely suspended, and the billionaire mayor of NYC arrested 26 reporters in one day with only a slap on the wrist.
You may as well spit in the wind as attempt any peaceful movement that doesn't have overwhelming support. Hence, the reason people are rioting and executing cops instead.