Yep the first is more like a lower-mid-range like LG Optimus L7/L5 or Sony xperia J hardware. I think it receives this nomination because there are worse ones like LG Optimus L3, Samsung Galaxy Y, … And Galaxy Pocket for example I don’t even call it an smartphone by today’s standards.
I’d say Sony xperia Sola is the best mid-range smartphone, it has at least a dual-core. :)
But I see these first Mozilla phones as developers previews, by the time Firefox OS comes to the market it’ll be launched in new devices.