Jason, I have both the Vera stack and the SmartThings hub (early adopter). I also support a smart-home setup for a friend.
Flat out - they are all about the same. Each has it’s quirks, each has its strengths and each is a piece of technology so it will be flaky at some point no matter what.
For SmartThings the big plus is ZigBee. For whatever reason this is where the market is headed. Using some of these sensors is so much easier than z-wave, and overall the IFTTT integration allows the platform to be truly an internet-of-things delivery vehicle. But Zigbee tends to be battery heavy for whatever reason so I find them flakier than their z-wave equivalent. The iPhone app is getting stronger daily and the android app is relatively stable. I especially recommend the presence feature offered here. The 3rd party development (i.e. users) is getting stronger daily as they get more info and features enabled.
The big minuses, is that the platform is VERY new, doesn’t support offline support of triggers (a big issue when I lost internet for 3 weeks due to an ISP problem) etc. Cameras are still flaky, and local IP integration is problematic, but definitely getting stronger.
For the Vera, I’d say mostly the 180. Extremely strong with z-wave and local IP. Cameras, alarm system integration, Sonos, AV system automation etc work very well. Strong 3rd party development community, but many are losing patience with the slow development cycle though UI7 sounds like it’s gotten everyone active again. HUGH threads over on the community site right now as everything is being re-written.
And the clear winner from my side is the standard Z-wave light switch that works regardless of the system being up-down or even removed (as I found out supporting the SmartHome system!). You get the advantage of PHYSICAL connections so your better half is never left stranded.
What the Vera stack truly lacks is the IFTTT/Internet-of-things and Zigbee support. So my recommendation is considering the investment you have - DO BOTH! Heck for those who only have ST, I’d recommend a Vera Lite or Vera 3 and spending the extra money on physical z-wave switches where possible.
I’ve managed to replicate or duplicate the functionality on both systems giving me the advantage of both. I can use the ST iPhone presence and interface for quick views and access to status of what is going on in the home. Much better than the Vera mobile interface.
At the same time, I leave the home automation aspect to the Vera as it is reliable and I know it works even when the internet is down, or I accidentally close the app on my phone.
I’d also recommend adding one more layer, a QNAP for cameras. That allows me to manage my cameras through a fully functional PVR interface with proper motion capture logic etc. Linking your home security system into the VERA and the QNAP gives you piece of mind that everything will work, no matter what happens.
On the Vera side, give them a call and have them do a wipe/reset of your controller. That fixes 99% of the issues and if it doesn’t work they will usually swap the controller. Ditto from the ST side from what I’ve heard.
Best of luck.