Interconnects for Solo Ultra-Linear

If you choose either of those cables be aware of a couple of things -

a/ - the Red Dawn are unshielded and may be subject to pickup of noise/RFI etc,

b/ - many of the VDH D-102 sold cheaply on ebay are not factory terminated, they have been bought as bulk cable and terminated by the seller or another third-party.  The quality of this work may or may not be up to standard.

What sound characteristics you will identify and prefer is very dependent on your other equipment, music tastes and personal preferences.

Changing headphones will make a much bigger difference.

If you want to hear the amp as the designer heard it then use the cable the designer used.

There are good quality, shielded, cables, available from a number of sources relatively inexpensively if you prefer not to use the Cusat, it would be improper for me to recommend or suggest them here, perhaps check a few other forums for ideas.

Graham has also published, at one time, articles on DIY cables from inexpensive materials, these have received favourable report from those who have made them.