Yesterday, I had an opportunity to compare the Evahs with Zyex. Similar basses, 5 different bows. I found the Zyex very nice strings and at an excellent price. The Zyex are very smooth and low tension so they’re easy on the left hand. They have more sustain and are brighter than the Evahs.
Pizz, the Zyex had a bit more oomph in the lower register and spoke better in the 3rd octave because they sustain more. The 3rd octave with the Evah’s is almost a why bother because the note decays so fast it’s tough to hear the pitch. They had a bit more presence overall, IMO. Acoustically, I like their sound quite a bit, but I’ve heard them amplified and then I thought they had too much sustain for an upright, sounding a little too fretless bass guitar-like, but that could have been the room or the amp, I suppose.
Arco, both strings sang beautifully. Again, the Zyex were brighter with maybe a bit less depth, maybe more of a violin kind of tone rather than a cello tone, if that makes any sense.
I like the Zyex quite a bit, but I think I’ll stick with the Evah’s for now because I like their more complex and deeper tone.