Has anyone tried Rejuran HB?

Can you actually feel a difference in pain between Rejuran Healer and HB?

I'm looking into getting Rejuran, but there are so many reviews saying Healer is really painful.

I heard HB is painless, but I'm not sure if there is really that much of a difference.

If the effects are similar, would it be better to just get HB?

I'm curious about honest reviews from those who have tried both!