Here's what @flu_fighter has to say regarding that:I've SOR and interested in purchasing SOG. Is SOG just like SOR with more bass or are there other differences (briefly)?
some brief comparisons between the SOR and SOG as both are still burning in
SOR has got more definition in the leading edges, mostly due to it being closed, SOG in comparison has got a softer focus in that area.
SOG's bass is heavier and has a bit less treble. SOR was quite bright at the start, but since then the treble has settled down a bit, but can still be a bit bright sometimes, will have to see how it goes as it gets more burn-in.
Both will definitely go through really crappy passages of burn-in, I think the SOG's mids disappeared for a while around 150 hours, then it came back.