Thrusting dildos add a motorized back-and-forth motion, a mechanical simulation of in-and-out movement rather than the buzz of vibration, though most also vibrate on top of that. If motor features generally, not just thrusting, are what you're after,
Vibrators covers that ground more broadly. A large share also cross into
anal vibrators, since the same back-and-forth motion works there too, and a couple mount onto a sex machine base, also featured in
Sex Machines.
Motion, Not Just Buzz
The thrusting motion is a genuinely different sensation from vibration, closer to movement than to a hum against or inside the body. Most thrusting dildos combine the two, so you get both a moving shaft and a vibrating motor rather than one or the other, which is the same overlap covered from the other side in
Vibrating Dildos.
Stroke Length and Speed Vary
A shorter, faster stroke feels different from a longer, slower one, and this collection includes both. Check the stated stroke length if you have a strong preference, since it isn't always obvious from the product photos.
Bracing Helps
Because the toy is doing active motion rather than staying still, bracing it against something (a hand, a harness, or a flat surface) usually works better than trying to hold it freehand the whole time.