I’ve created device handlers for 3 out of the 4 you listed so I’m very familiar with them.
If you need it to run locally you can use a custom DTH to configure it and then use one of the alarm or switch handlers that run locally to control it.
If a siren goes off randomly it’s almost always due to a faulty sensor or issue with SmartThings and not the siren. When making your decision, you should also consider what you would do if it turned on and you couldn’t log into SmartThings to turn it off.
Zooz Smart Chime:
Battery only, optional strobe, multiple alarm sounds, and 3 volumes.
It runs on batteries and is really small so it can be put anywhere, it’s great for chimes (which you don’t need), and the battery life is OK, but it uses to CR123 so they’re expensive to replace.
It’s probably not loud enough to scare anyone off and it can be easily turned off by twisting it off the wall and pulling the batteries.
Aeotech Gen5 Siren:
Powered, battery backup, strobe, multiple sounds, and 3 volumes.
It’s small, looks good, has a typical siren sound, and has an internal battery backup, but when running on batteries there’s no way to determine the battery level.
Lots of users have reported a constant hissing sound that can be heard when within a few feet of the device and some users have reported that it’s not loud enough.
The LED can’t be turned off and the plug is part of the device so I don’t believe you could mount it on a wall, but even if you could, there’s a big button on the bottom that turns it off so it would still be the easiest to disable.
GoControl Z-Wave Siren & Strobe
Powered or Battery Only (depends on the model), siren and strobe (slow flashing red light) can be used independently, 1 sound, 1 volume.
It’s really loud, attaches easily to a wall (even powered model because it uses USB cable), the battery life is OK and it uses 4 AAs which are inexpensive to replace. It’s large, ugly and partially red so it’s easy to notice.
I don’t have the powered model, but the battery mode can be slid off the wall and the batteries removed to disable it.
Zipato Multisound Siren
(This is a Zigbee device, but I didn’t notice you were just looking for zwave devices until after I wrote it so I’m leaving it here)
Powered, battery backup, red LED, multiple sounds, 1 volume.
Really loud, it uses a USB cable so it can be attached to a wall, it’s large, but it’s also white and flat so it’s not that noticable. It has an internal battery backup, but when on backup power there’s no way to determine the battery level. It’s Zigbee, more expensive than the others, and the led can’t be turned off.
I just made the mistake of sliding off the back cover to see how difficult it is to disable and I discovered that it turns on when opened and doesn’t turn back off when shut. I didn’t see a way to disable it so I held a pillow over it while pulling up the Mobile App to turn it off, but it was still really loud.
I just checked the manual and it can be manually turned off by holding a button and pushing another button 3 times, but the buttons are difficult to see and I can’t imagine anyone sticking around long enough to figure it out.