Daisy chain uses both jacks using both 68K resistors
example- guitar goes into 68k input resistor hi input jack
The Low input jack 68K input resistor is daisy chained
to the other amps channel input so there is another
68K

So Daisy chain uses 3 input 68K resistors so the impendances
is different because there is 3 68Ks resistors in parallel

The Y cord just uses 2 input 68K resistors i don't know if its in
parallel i know the signal from the guitar is parallel to the
amp channals
example: guitar output gets Y cord the Y cord splits to Two
different different amps channels one being a marshall
and other amp being a fender amp. So there is only
2 68K resistors and not in parallel i think

So the Y cord uses 2 68k resistors

The Daisy chain uses 3 68K resistors in parallel or more if you
have more and more amps

So the impedances are way diffeerent from using a Y cord than
Dasiy chain

what do you think im guessing here