Benefits of Reta vs. Tirz?

For those of you who are experienced with Reta, do you think it's superior to Tirz and if so, in what way? Do you think Reta is good for long-term maintenance? I have heard about the heart issues associated with reta so I'm reluctant to try it long-term but maybe I haven't done enough research into that. Just curious if you made the switch from tirz to reta, what benefits you've had, and if you think it's superior and if so why. Thanks!