I'm sure you'll draw a wide variety of many experts to provide dissertation on this topic.

I'll say this - there is a point, very definitely, where a pattern pilot can "tell" (feel) the difference between analog, non-coreless analogs, digitals, and coreless digitals. Each step provides a tighter "loop" between your eyes/fingers/plane.

And - each requires more meticulous setups of linkages, hookups, control surface deflections, servo mounting methods, and the expo or ATV.

The "judge" will only see a difference if you are able to respond more rapidly to a change in the airplane because you have the "better" servos. I tell people that when they are flying airplanes they have trimmed to a resolution where they can "feel" when a linkage gets a little slop, or the servo pot gets just a little hesitation at center, then they likely will benefit from "better" servos.

Of course, many will say to "buy the best you can afford", and relative to servos, I endorse that perspective. But whether a judge of YOUR flight will know whether you are using digitals or not, I have to say, I don't think so.