Very interesting question...

Implants are more or less the same regardless of the manufacturer. Typically, it is a Titanium Cylinder or screw that is available in different lengths, and diameters. Most specialists are familiar with one or two systems as it is quite costly to have a stock of several manufacturers. Usually, one or two system would be sufficient to cover the majority of patient needs, unless there is an unusual situation that would prevent to do so. I routinely recommend a CT Scan evaluation of the jaw(s) to insure that sufficient bone is present and to evaluate the proximity of vital structures such as the sinus and major nerves. The CT sCan is very critical in the planning phase and based on the results the implant size -and in some cases- the manufacturer are selected. Another important aspect is the versatility of the restorative options -ie the abutment and the crown on top of the implant- some manufacturer do not offer a customized option which would sometimes compromize the esthetic outcome. Nobelbiocare is one of the most widely used and it is quite verstile and allow us to customize the abutment and the crown. Otherwise, in my opinion if sufficient bone is present, the surgeon will use the longest and widest diameter as long as this is planed with the Prosthodontist -Restorative dentist-.

Hope this answer some of your questions.

Overall if a detail and little thing does not matter to you, all implants are the same.

My preference would be in the dentist performing the procedure. You must have total trust and feel comfortable with the dentist himself/herself.