You miss the point: the Solo2 has two single tuners, fixed on the motherboard. Those two single tuners make the box a twin tuner box. The Solo2 has no option for dual tuner(s).
But the DUO2 has 2 tuner slots, allowing (one or two) dual tuners (and/or DVB-C/T tuners), making it a triple (or even four) tuner box..
A dual tuner (card) is not the same as twin tuner box.Not at all. I know exactly what it's all about. It's just that you refuse to admit you made an error, that's what this is about.
Sorry, to say, but then you hide your knowledge very well.
So again: the Solo2 has no dual tuner(s), the DUO2 has the option for one (or maybe even two) two dual tuner(s). So not sure what mistake I have made in saying that before.