David, "nothing" surprises me anymore regarding guitarsound diffrentces.....
I have two slabboard strats from 1960 just a couple of months apart and they sound so diffrent...it must be the color
the high bell like sounding one is F red and the warm/dark sounding one is a D Blue one
the later is just 100 gram heavier and has slightly fatter neck...
Your 40th anniversary Marvin is one of a very early or pre series made, Hank and Bruce just both had two so maybe the one you own was number 5 that was made...maybe the specs are a little different from the later series? Bodiewood etc is maybe closer to wards the more valuable Legend then the later series?
I bought two 40th AHM no 61 and 62 and I gave 61 to a friend,but both sounded more to wards a strat comparing my real Marvin......
Later I bought a GB made Marvin in greenburts just for the color and the correct neckpocket
and I was pleasantly surprised how well build it was comparing with the 40th and surten the original 65....
The sound of the greenburst was nearly the same as the 65 only louder.
I understand your wish to own an original,but David it isn't the holly grail either...I think I handle between 25 and 50 original Marvins... at one time 7 in one room
they all differ..... bodies where smaller and larger,scrolls,scratsplate ...the lot.
Buildquality was not special.....
3999 GBP ouch I paid 720 GBP in 88 for mine.....
Most are raving about the Apache Burns as top notch,but sorry I don't fancy one...also the Shadows Custom...is not on my list....
I could buy them in a jiffy if I want, but something is holding me back... call me oldfasioned or so but a Marvin should be white or greenburst and a rosewoodboard neck etc....
The 50th Shadstrat you bought, well you know my collection and again something is holding me back on that also...not the price but mostly the one that always must be obeyed ....the power inside said " you have already 9 red guitars"
Not really ...I played Apache (acoustically) on the original 34346 and direct after arriving home I grabbed my aug 58 f red and it didn't feel any diffrent...
I don't know if you listen to my Happy Birthday soundfile (more than 200 downloads, not one comment)you can hear the old girl on the left channel and soundwise it's in the same ballpark....IMHO
Over to you David