This.
There are different tiers of synthetic oil
- Boutique - Redline, Amsoil, Schaeffer
- Top Shelf - Mobil 1 AP/EP, Pennzoil Platinum Ultra, Castro Edge EP
- High end - Mobil 1, Pennzoil Platinum, Castrol Edge
- Standard - Quaker State, Mag 1, Kendall, Mobil Super Syn (or whatever it is called now) Most OEM branded oils
- Budget - Store brand oils
This is not an all inclusive list for each category, just a few examples and is just my opinion.
For the most part, nothing wrong with any of these oils, and for most you could run a budget synthetic and notice no difference in the engine life vs using a boutique oil.
Do you get more with the more expensive oils, sure.
Is it worth it? Only you can decide.
IMO, since API SN, as long as you change the oil on a regular basis (and that basis does depend on the vehicle) using a semi decent filter, you will not have an oil related issue with your vehicle.
Not saying some vehicles will not require a more detailed look at what to use, but for most this will apply.
For me, the "best" oil is the cheapest one that meets the spec for the vehicle it goes in.
Look at my sig, I use a variety of oils, all of which were purchased based on the sale/clearance/rebate price (as long as it was an oil viscosity I can use). Brand played no part in it.
The "best" oil will vary depending on many factors, including cost, vehicle, how vehicle is used, location, desired oil change interval, and several other factors, and even with all those addressed, there may be several "best" oils for you.