helenrose,
Evenity is a newer drug, more heavily advertised, with a black box for cardiac issues. The bone expert is right that it adds bone more quickly. The bone it adds is surface bone somewhat like a scaffold. Evenity doesn't remodel bone.
Forteo and Tymlos are the two medications that remodel bone. They remove bone that is fissured or damaged and replace it with fresh bone. Neither of these medications have a black box warning attached for health.
And any of these drug can cause miserable side effects. Forteo would be the safest for you in regard to side effects, because you already took it 25 years ago.
Doctors prescribe because of what they've seen and what they haven't see; heard and haven't heard. Right now they are hearing a lot about Evenity--the newest tool in the box. My own doctor has just been offered a speaking engagement with Amgen, and will, no doubt, be prescribing it more often.
Cost and ease of use can also factor in as Medicare pays for Evenity under part B.
I'm on my third year of Forteo. It has been a wonderful drug for me.
Bless your choice.