Skip the pattern count. A vibrator with twenty patterns and a thin, high-pitched motor will disappoint you faster than one with three speeds and a deep rumble. Here is what to weigh instead.
Rumbly versus buzzy
Cheap motors spin fast and light, which produces a buzz that sits on the surface of the skin and numbs it. Better motors move a heavier weight more slowly, which produces a rumble that you feel deeper. If a product page does not mention the motor at all, assume buzzy.
External, internal, or both
Most people with a clitoris get there from external stimulation, so an external toy (a wand, a bullet, an air pulse toy) is the safest first purchase. Internal and dual toys are a second step once you know what you like. A dual toy bought first often ends up used only on the outside.
Noise matters more than you think
A toy you are worried someone will hear is a toy you will not use. Under 40 decibels is quieter than a normal conversation and is the line we look for.
Materials
Silicone, ABS plastic, glass, and stainless steel are body-safe. Anything described as jelly, rubber, TPR, or "realistic skin" without a material name is porous and can hold bacteria no matter how you wash it. We do not stock porous toys.
Charging and waterproofing
Rechargeable beats batteries every time. IPX7 means you can submerge it, which makes cleaning trivial and shower use possible. "Splash proof" means it is not.