Some observations about quality: the Filco has a nice, thick, glass/epoxy, double-sided PCB with through-hole eyelets. The Leo is a thinner, single-sided PCB using lighter materials (looks like an old FR3 board to me). The single-sided PCB actually made it much easier to desolder than the Filco. The Leo's plate is attached to the PCB in 4 or 5 places, while the Flico's is fully floating (it's actually the PCB that floats, since the plate is what attaches to the case).
Both boards had solder and assembly issues, so I can see why people report issues with both. For example, both boards had solder flow issues and both boards had switches that were not fully seated against the PCB. Soldering is more critical for the Leo, since it only has the PCB surface to attach the legs to. The connector inside the Filco was badly mangled by whoever jammed it together. The pin for the shield drain was bent and mangled. Luckily, it's not completely necessary for the board to work. I like how the controller attaches to the PCB on headers.