The lighter color wire on the Futaba is from Amazon. My LHS sells the exact same wire at twice the price. Same wire that I use for nearly everything.
https://www.amazon.com/gp/aw/d/B0746HRVZP?psc=1&ref=ppx_pop_mob_b_asin_title
The brighter wire on the Novak is from Yeah Racing, got it from Amain. I needed the blue for a few esc's.
https://www.amainhobbies.com/yeah-racing-16awg-wire-kit-w-shrink-tube-black-blue-red-3-1.9ea-yea-wpt-0032/p1358961
Both are tinned copper, very flexible, and solder easy.