They use similar needles, and that is where the similarity ends.
Different reasoning
Acupuncture comes from traditional Chinese medicine and works with points mapped along meridians. Dry needling is a Western technique based on anatomy: the needle goes into the muscle’s trigger point, and nowhere else.
Different sensation
Dry needling often produces a brief involuntary twitch as the trigger point releases. It is a strange sensation the first time, but short-lived, and usually followed by a noticeable easing of tightness.
Different treatment length
Acupuncture needles typically stay in for 20 minutes or more. Dry needling is usually a matter of seconds per point.
Which should you have?
If your problem is a specific tight, tender band of muscle limiting your movement, dry needling is generally the more direct route — particularly alongside a rehabilitation programme.