The EQ I'm using in Furthermore is an odd one, it's actually an inductor-based passive EQ capable of boosting mids, using custom-wound inductors (courtesy of Lightning Boy, naturally). The result is different; Venus X's EQ gives it a more modern, fast, snappy feel, whereas the Furthermore EQ feels more vintage and hi-fi.
I really like both and feel like there isn't that much overlap. Furthermore will not make Venus X obsolete, and personally as a player I can find separate uses for both. I would say that between the two Venus X has more tonal range as far as the number of sounds you can get out of it, especially with the two channels and the cabsim, but the lovely EQ and the HPF/LPF will make Furthermore a different and very useful beast.