I've looked into that myself (the zinc). I personally prefer redline for various reasons, mainly just my personal experience with them (they are an ester / PAO based synthetic) but unless you're running in the top 1% of the performance range most any synthetic oil on the market (that meets minimum standards) will do the job. None is clearly better than another in any scientific testing I've seen (though stablity and consistency has been better in what I personally have seen from Redline, but that's only anecdotal).
If you want to really get into oil - see Bob Is The Oil Guy (particularly with how UOAs are abused / misused) and a good basic primer is this Hot Rod article (clearly shows what to expect from any synthetic versus a mineral based oil).
https://www.hotrod.com/articles/truth-synthetics-way-just-extra-hp/
I think the clearest proof that no one synthetic is head and shoulders (or statistically significant) better than another is the fact that the auto manufacturers don't cluster around one. If you had a clearly 10% better product, they'd beat a path to your door.