one of their selling points on the 10x is that it is a harder material so even if both start out tight, the 10x should stay that way much longer.
The trigger feel is very subjective. With a 12lb hammer spring, extended firing pin, and reduced power firing pin spring your pull weights would likely be lower than your Accushadow, 5 3/4 and 2 3/4 being the likely result.
Dropping 500 into a disco, hammer, and polishing can make that maybe a little lighter, maybe the same, or maybe even 3 or 3 1/4 on the SA. Subjectively it should "feel" better though with less pre-travel/take-up, a shorter reset, smoother feel, etc.
If those diminishing returns are worth it for you, go ahead.
They often are for me as nearly all my S1/S2s have been to or are in progress at CZC now.
But a S2 with just the 3 parts I mentioned won't hold back anyone.