The inverse is also true.
The only way to sound exactly the same,
is by playing them exactly the same.
Adding, with the same gear.
Exactle the same in 1/8 quantization or less is a very finite space.
And this approach is what you think makes for good music...everything the same, quantized for accuracy...?
OK...I guess we all have our styles and preferences.
....the amps themselves will sound the same.
Yeah...my amps all sound the same when no one is playing them.
You're arguing that the same brand/model of gear sounds the same...OK, but you leave out the rest...someone has to actually play/use the gear, and THAT is where the differences come from.
Go turn on your amp and stand back and let me know how it sounds without anyone playing it.
No one is saying that gear is not important, or if 10 people buy the same amp, it won't generally be the same sounding amp.
What's being said is that when people play, no two people sound the same, and even one person strumming one chord several times, each strum will not be identical. Sure, it may still be an "A" chord, but the subtle difference in the harmonics and dynamics of each strum is where the beauty lies.
I would think it would be totally boring if every strum was 100% identical....but apparently some people want that, and they use MIDI and preset patches to make everything the same, and robotic.
There is an article in the current Tape Op magazine where an engineer talks about tracking stuff with Neil Young, and how they took 10 Fender Reverb Deluxe amps, tried them all...and picked out the two best sounding ones...so even you're notion that every Fender is identical is not accurate.