Noise reduction is not essential for protection but can mask perhaps problems. PTFE is not that good on the friction angle probably causing heat so why include this solid.
The only other oil using solids appears to be the cheaper end of market.
Amsoil has been run for long OCIs without problems.
Most mainstay oil companies probably take a conservative view on oil changes until pushed by the maufacturer due to increasing service intervals. At best Synlude uses a good basestock but, too much ester may not be good so must be a fairly standard PAO plus some esters, but not worth anymore than other synthetics. An oil can only take a certain amount of additives which is the reason for usually changing a synth.
An additive top up is being worked on I believe with oil filters, so the top up appears to be only difference but how this mixes with the old oil is a questionable.