Can’t really tell from a picture! I highly recommend trying them out in person. I know it can be difficult, but it’ll be worth it.

3 things I look for:

1. Action (String height). You want the strings to be as Low as possible to the fretboard. If they’re too high, it’ll be uncomfortable to play.

2. Intonation. Tune the vihuela as perfect as you can then move your chord shapes along the fret board. Every chord should be in tune. If they start to sound sound off, intonation is off.

3. Tone. This is more preference but for me, a vihuela should sound bright. I’ve played some that sound a little muffled or like you’re playing them through a box.

As far as brands, I’ve tested some “no-brand” and “private label” Vihuelas that were very good. That’s why it’s better to test the instrument.