Want to sound as good as either of those guys?
Trust me, you'll STILL be spending hours and hours setting up the Lowery or Wersi to sound that good. You think those are factory presets they are using?

The Lowery (I don't know what model that is, but the big display and the sounds might suggest some kind of VST capability - I might be wrong) and the Wersi both are anything but simple to set up in the first place. You want that degree of complexity, and sonic choice and quality, you HAVE to deal with computers, whether they sit inside a behemoth case or not... And sorry, guys, but setting up a software VST instrument is nowhere NEAR as complex as you make out.
The truth is somewhere in the middle. For those that haven't probably cracked half the features in a standard 'closed' arranger like a T2 or PA2X Pro, yes, achieving that sound and fluency of changing registrations will be difficult at best. On anything...
But, as I said at the start, forget all that hardware stuff. How many of us have the imagination, the taste, AND the chops to pull off an arrangement like that, anyway? I'd certainly like to hear it if anyone could! Truth is, take the Lowery clip for instance. Break down the sounds in each section. There's nothing I heard there that you couldn't do sonically with a T2, or PA2X Pro. Layers, splits, VERY standard orchestration (no sounds that any of these keyboards don't already have).
Any of you could do something VERY similar, if not identical, if you only had the imagination, programming skill and virtuosity on the arranger you already have. But buying this Lowery, or a Scala is NOT going to make you one little bit better than you already are. If you can't make a T2 do this, you won't be able to on a Wersi, either...