It's not really a competition... the LX are in a completely different league in all aspects. The only thing the Vega (OG and 2020) have over the LX is coherency.
Really? I've never heard the Vega (either version) but I've got the Dorado 2020 which has some of the same DNA as the Vega 2020 and the Dorado wins or ties for me over the LX in all areas except resolution in the upper mids. YMMV and all that.