Is the card you get everyday for your subscription the same card that you would get the trailer for on that day if you were not subscribed? I'm considering subscribing instead of just buying tickets and I'm trying to decide if it's worth it.

Yes.
The bottom row of the calender, under coming soon are the cards you will get each day as a subscriber.

Don't be surprised if the calendar "scrambles" and gives you all new girls when you get the subscription.

It did for me.

If there's any cards you specifically want in the calendar right now, I'd buy them for the 1 ticket before you subscribe.