Iris vs. Antirrihinum

Hi all, I'm looking at planting some full-sized iris and some antirrihnium in the same border. Question is, which one should go in front of the other? Obviously tallest ones at the back but which would that be and is there anything else to consider?

Thanks!

Iris are the tallest I think but like to have there tubers/roots baked so shouldn't be in the shade.

Just thought do you mean bearded iris?

'cos these come in dwarf varieties too 

Plant the snapdragons at the front so you can make the most of the scent