The RE040's eidolon has (and I used to have) are shocking in the wet. Bad grip, rubbish under acceleration and dire under braking.
Dry warm roads though - great, nice feel, plenty of grip.
I know there are a few different compounds on the 040 though - certianly the jap 040 is different to the EU 040, didn't know the VX had it's own 040 flavour but doesn't surprise me at all.
I changed to 010's - same price, but I think they're just softer compounds so much better in the wet, and you dont need to light them up in the dry to get them to bite. Doubt they'll last as long as the 040's but I dont really give a fig - just want something I can be confident with & the 040's made me nervous.