Comparing settings really doesn’t help OTHER than give you an idea what a possible good range is.
The technician looks (or should!) at many factors when choosing YOUR setting: hair colour/density/thickness as well as skin colour/type/thickness and if there is a hint of a tan and what medications/topicals/herbals the person is on or has been on in the last 3-6 months.
Using someone else’s setting as a guide may throw you off your own treatments or cause damage to yourself if you push your technician to up the settings.
For your own optimal results: get the technician to do 3 patch tests with a range of settings. Then come back in a couple weeks (after the hair is shed or even 48hrs if you want to get started right away) for the actual treatment. The Technician will pick the best looking test patch with the highest setting.
You will also decide which of the three depending on your pain tolerance. They may start with the highest settings, but it may to too painful for the first treatment (It’s ok to go for the lower setting test patch as long as the hairs have previously shed. Next treatment will be higher).
If your in the middle of your series and you want them to keep raising the settings (if they don’t already do this), ask them to do one small inconspicuous area (approx 1x1")in a higher setting for the next laser treatment. That way your skin is safer yet receiving an effective laser treatment.
Remember you won’t see any real results at least until the 3rd laser treatment. You will need the 6-12 treatments depending on machine/settings. Completing laser treatments at 3 or 4 sessions with 85% reduction is pretty rare (I’m talking about years of being hair free NOT 4 months worth), so don’t expect it will happen to you. If it does, feel proud and lucky you saved all that time and $ 
Most of the hairs should shed every treatment. They won’t shed if your settings are too low or your hairs are too light or fine (fine brown hairs can be too invisible to the laser) or the machine is maxed out for your skin colour and they cannot safely treat you to up the setting.
After you notice the laser is no longer working for you DO NOT keep going back for more sessions, but move onto electrolysis if you are looking for complete hair removal.
Goodluck with everyones hair removal journeys!
Oh I forgot to mention that even tho the compared settings may be with the EXACT model/brand of laser…the output of energy may not be the same due to manufacturing, calibrations, maintenance and so on. I worked with two lasers that were the same and I found one more powerful by a couple jules…that can be very significant if, your maxing out someones settings near the end of the treatment series.