Difference Between Vaginal Rejuvenation with Laser and Without Laser?

Vaginal rejuvenation can be done with laser or radio-frequency. Both stimulate collagen production and strengthen the mucosa. They both increase tightness and lubrication. In my experience, radio frequency works slightly better for tightness, while laser provides slightly more lubrication.
New machines emerge every year claiming they are the best without evidence base. All these devices are FDA cleared machines (meet standard for safety to use) but they are not FDA approved for the indication of vaginal rejuvenation. The closest one to my knowledge is ThermiVa radio frequency which is approved in Europe for Vaginal Rejuvenation.

This is a good question but clarification is needed.  If you are referring to office procedures that are non surgical there are Lasers such as the femlift that can provide some tightening. Compare this to Thermiva that uses radiofrequency.If you are describing a surgery to tighten the vaginal canal that is different.  Laser vaginal rejuvenation has been marketed from Beverly Hills for twenty years.  The surgical outcome is determined more by the surgeon and the anatomy than the energy source used such as a laser. 

Thank you for your question 
There are two uses for lasers in “vaginal Rejuvenation “ 
One is the noninvasive procedure which takes a few minutes(Mona Lisa etc) . This along with radio frequency (thermiva)can increase circulation and collagen formation to improve dryness and mild vaginal “tightening “
The other is use in surgery. This is only a marketing tool and has no practical effect. There is no significant difference in blood loss or any other benefit. The term is a trademark used to promote a traditional procedure called anterior and posterior repair.