Late reply, but if you can stomach that wacky peak on the Vega, it's faster, more technical then the Lyra and admittedly has more sub-bass over the Atlas (shcking, I know). I sadly could not live with that wacky peak as the Vega does like to come in hot in the treble akin to the TH900. The Atlas is an all around better successor to the Vega but I don't believe they are as low in price yet comparatively. For the cost though, it may be worth it depending on your sensitivity to that 7-7.5k hz peak. The Lyra is very similar to the Vega FR wise but lacks that extra oomph in the sub bass region and don't sound as strident and sounds pretty unique due to their Be driver. I still have mine an enjoy them but would be a liar if I didn't say how much more I prefer the Atlas over them FWIW.
I can emphatically say the Atlas is still my favorite IEM per CFA. I still pack them with me every single day and also still prefer them over the Solaris. Surprisingly, the Atlas does better with classical and acoustic more than one would think and them really get into their groove with Hip Hop, EDM, Soul/RnB, etc. I have yet to find a genre the Atlas doesn't excel in.