I never served for differences by I think that if you take the Linux sources of the same version and make a giant diff -uNr you'll get all differences.
I'm quite sure that without their modifications you will lost the keyboard and touchpad, this because they attach them through an i2c bus.
Thanks to kernel_chooser you can play with custom kernels with no worries at all.
I'm f on phone, forgive me any typo.