that looks like it, they are blue with white lettering and have VX(M) on the side. for me they sound pretty smooth, not overly bright like the FCs can be. seems that Nichicon has more of the smooth sound charachteristics to most of their caps. I have some HEs coming and i'll test them out too.. a lot of my channels came with these caps(VX), which i compared heavily to the FCs and PWs. the more i listen to them the better i like them compared to the FCs. the PW is very similar to my ears to the VX(M).
listening through channels populated with opa2604s, opa404s and 1% metal resistors so i'm pretty sure that it's the differences in caps between channels since that is the only difference, however i can also say that I've come across caps that sound differently with things like opamps that are not the same between channels so you might want to get a few and test them out.