I would go with the Plugin made by Bubble because it’s simple. When you charge the user it will redirect you to Stripe’s checkout. Just simpler and less hassle.
If you’re just looking for subscriptions, I’d use Bubble’s.
The only downside is that you can’t customize the checkout process. With Stripe.Js, you can build your own checkout process. If you’re ok with the default checkout, just go ahead and use Bubble’s.