What would I benefit most from - A chin implant or Kybella/CoolSculpting? (Photo)

I suggest beginning with an in-person consultation to discuss your options. During your initial examination, your #chin will be evaluated along with the neck and jawline. A weak #chin implies a lack of chin support for the skin along the neck line. In younger individuals a chin implant alone is usually all that is needed to improve the appearance of the neck. Subsequently, it will also improve the overall #balance of the face and can create the illusion of a smaller nose. As a stand-alone procedure, chin augmentation can be performed in the office under local #anesthesia. For individuals with signs of #aging in the neck, a chin implant added to one of the recommended procedures above, will provide optimal results. Also, #liposuction under the chin is also another option your doctor can discuss. If you are not a candidate for chin or neck rejuvenation at the time of your #consultation, your board certified plastic surgeon can recommend alternatives to address your concern. 
However, there may be additional options to improve the appearance of your concern to improve the overall balance of your face. Such can be best evaluated in-person. Consulting with a board-certified plastic surgeon who specializes in #face, #neck and #chin procedures is important to ensure you are receiving the best advice, care, and surgical experience possible.

Unfortunately your photos provide ufficient info for good evaluation. In-person evaluation would be necessery to decide about chin augmentation, type and size of implant, as well as adequate form of neck sculpting being that Kybela or liposuction. Good luck.

You will benefit most from surgical liposuction of neck. It is predictable, precise, faster and safer than treatments mentioned in your question.

The neck is built in layers. The fullness under your chin is not due only to fat, but also to deeper muscle, glands, and fibrous tissue. Coolsculpting and Kybella can partially treat the fat. Liposuction can treat it more completely. All of those options leave a lot to be desired on final result because they can’t treat the more important layers of the neck - the true foundation. I would treat this with a 1.5 inch incision behind the chin crease to treat all neck layers at fault, and also consider a chin implant through the same approach. Please see the video below. All the best!

In our practice, we would recommend surgical liposuction in  the neck to permanently remove fatty deposits and placement of the chin implant. Both of these can be performed through the same incision under local anesthesia as an outpatient procedure. Kybella will require multiple injections over the course of several months with significant swelling and downtime for after each injection. Best to have all of it done at one time, to minimize the amount of surgical downtime with bruising and swelling. For many examples of this combination, please see the link and the video below

 Hi, I have performed many facial shaping procedures, including Chin Augmentation with dermal fillers or silastic chin implants, for over 30 years.  From the photos, your chin is weak and there is a "slight" amount of excess fat under the chin.  When the chin is weak, this creates an imbalance making the nose appear larger, the mid face top heavy, the lower face looks short, de-emphasizes the lips and allows early formation of a "double chin".  
 Proper placement of a silastic chin implant adds forward projection to the chin thereby creating harmony and balance to the lower face.  Using the same incision, liposuction can be performed to reduce the fat and further shape the neck.  Excess skin, from below the chin, can also be removed through the same incision.  
 I have found that placement of a silastic chin implant, through a small curved incision under the chin (also allows excess skin removal) to be very safe, quick, highly effective and far less invasive than a sliding genioplasty (requires extensive tissue dissection, bone cuts and placement of metal screws and plates to secure the cut segments of bone).  I perform chin implant surgery in 30 minutes or less, often using a local anesthetic alone.  In my opinion, you are a good candidate for chin implant surgery.  In contrast, reducing the fat by itself no matter what method is used will not add the forward chin projection that's required to correct the weak chin.
Hope this helps.