Different oils for different holes isn't a bad thing. Just the convenience of one oil. And if there is an internal leak, it doesn't contaminate the hole it leaked into.
What I do is go to an independent testing place and look at their tests for any given oils. Compare their results. You might find the oil you have trusted for years is lagging far behind related to others.
One thing I have found, is Amsoil is quite "self critical" on their products. Also they go to length to explain what the tests mean, and why. I've been very happy with Amsoil for many years ! That doesn't mean it has to be the same in all holes, Harley says you can do that. If you would like to use different in each hole, & you have good luck with that, by all means do it !