HTC has always worked on user experience. They are the Apple of the android world IMO.
It's entirely likely that you're experiencing better performance due to optimization and lack thereof on the Samsung.
Just to note... both HTC and Samsung are equally guilty for... obscuring stability in favor of performance.
For instance, the garbage collector is overly aggressive on the HTC One X (more aggressive prior to the update), and its general goal is to keep pushing stuffs out of memory... leaving gobs of free memory that aren't used for anything at all. It looks good to the user because it leaves the illusion that they actually "optimized" Sense UI for low memory usage, but... it interferes with multitasking on the device. In some extreme cases (though rare), it may even cause apps and widgets to crash. Also funny is the fact that it also kills Sense UI more often than not.
Samsung? Worse. They make it so that on the GS3, the garbage collector does not fire that often, thus it increases performance as things stay in memory for longer. But they also limit pool size, so in reality, an app would run out of memory faster and crash more often. This looks good on both benchmarks and to the user because it gives the illusion that they optimized TouchWiz + improved performance, but it causes apps to crash more often and force developers to think very carefully about what they can cache and shouldn't cache. Coupled with Android's total lack of any memory management technique other than reliance on the GC, and we have a recipe for disaster.
Their older devices aren't like this. In fact, even with 2GB of RAM, I dare say the GS3 is more crash-prone than the HTC One X with 1GB, and the HTC One X is worse than the Nexus S, which has only 512MB...
I don't think they need to do this at all. Android since 4.x has had many tweaks to the garbage collector that make it more... friendly. It seems to me like they are taking criticisms to their custom UIs (Sense and TouchWiz) very personally...
I'd rather just turn off widgets and live wallpapers, they just drain battery for no apparent reason other than to look cool (there's a reason they were removed from Windows Vista).
It's funny you should say this... some people swear by widgets and live wallpapers as a way to differentiate from Apple users.
And in general, well-written widgets and live wallpapers should not drain your battery when they are not visible. That's a misconception IMO. Your cell radio and other background services run by Tasker and the likes are much more of a strain on your battery than widgets and live wallpapers.