You are supposed to practice the two together! Btw, let's use proper terminology: jhana = samatha practice, dry insight = vipassana.
To use even simpler terms, the former is called "calming meditation" the latter "awareness meditation"
They are complementary not supplementary to one another and actually really one practice...
"Really one practice"
That is an advanced subject that will not be given full justice on a mere Q&A here. Thus, I suggest reading the chapter about the two in the book "A Short Walk on an Ancient Path" by Brian Ruhe.
Basically, vipassana and jhana cultivation are not two totally separate routes. You cannot just tranquilize yourself into jhana but will still exercise STRONG observing faculties in order to concentrate on the meditation object. The better you are at vipassana, the better you should be at calming yourself and vice versa.
Vipassana, which is pure awareness, instead of having any material meditation object, uses your innate formless awareness as a meditation object. Basically its a meditation object of no-object.
What is the object when doing "jhana cultivation"? A material object such as your breath.
Perhaps when you meditate you will notice this:
"OK. I am going to focus on my breathhing... Breathing in, breathing out, breathing in oh! Noting I just thought about my mom, coming back to breath, breathing in, breathing out"
Jhana would not be possible without vipassana.
Thus, there is only one practice: jhana.
That's why the buddha doesn't talk about vipassana in the original texts, just jhana and his reccommended route: breathing meditation.
It's also why Thich Nhat Hanh does the same.
The answer to your question: yes! They are one and the same but can be focused on separately to help you perfect Right Meditation and lead you to jhana.