I don't think that's comparable tho. The Britney hate train and bullying were on another level. Plus, it doesn't help that at that time mental health and the #MeTooMovement weren't a thing. And there's no social media to actually have at least some control over the situation.
Taylor Swift also has greater support from her management and has a better marketing strategy. She has this loyalty program and purchase incentives. She's really good with interacting with her fans. I mean, I think if Britney had more freedom in artistic choices, her albums, promos, and videos would have been better. I mean look at Taylor's social media accounts, promotions, etc. They're so well-thought of. It doesn't hurt that she can do whatever she wants with her projects.
But yes I agree, Swifties are more powerful now and are more fluent in stan wars etc. Although, in terms of power and loyalty today, I have to give it to the BTS Army (those guys are dedicated af and are actually scary and crazy sometimes). Swifties probably come in second (they can also be scary and crazy sometimes, I've seen Swifties on stan twt discredit Britney saying she wasn't that big even in her prime).