As someone who never considered E, rejected WinColl ( or whose Ds did), and went to an overpriced overhyped famous school herself, I am torn between rage and hysteria at this thread.
Eton had a give number in the services, of course. The usual first option for a second son was the army, followed by the church then the law. Waterloo was won as its Field Marshall said on the playing fields if Eton.
And in general for the nobility, once the private tutor had been junked, was a choice beyween Eton and Harrow. Winchester was founded with a concept of service , by what was in effect a civil servant.
That does not undermine eg other schools'contribution, eg Churchill, Wavell, a rare general in that he also produced a best selling poetry authority.
But all that is in the past. Schools' attributes come and go. Eton is indubitably far more academic than it was in my generation, and even then it was more academic than in my parents'.
Do think about your child. Eg, the dorm experience is important. I was indifferent to it until secondary when I detested it and single rooms would have changed my life, my DH hated it all through, and it is not good for sensitive children. On the other hand I reckon that I could survive in prison, which might stabs me in good stead, you never know.
Food, food, glorious food... It doesn't matter that much. There will be quite a lot and it will conform to nutritional standards. If nice that's a bonus, if not it hardens you up for prison, see above, and gives you wowonderful anecdotes for the future.
At WinColl it's often dependent, as it was at my school, upon the house.
The best thingd about these sorts of schools are
They teach you the basics to a high standard
They help you find out what you are interested in
They help you find out what you are good at
They have all the facilities to do all of those well
And they have very high aspiration.
You then need to decide where your Ds will thrive. In fruit terms, does he like apples, pears, or oranges? wine, Champagne, burgundy or claret?
It's not a question of one size fits all.
Once again, and thanks for the re mention, make really really sure where you see the clear blue water. Both between these schools and these and his existing one.
BTW, sorry about spelling etc, always on phone.