I think the VW is A-MVA and the other two are P-MVA. I'm not positive on that. A-MVA an improvement over P-MVA, offering better contrast and less color shifting. I haven't seen an A-MVA in person, but it sounds like A-MVA would be the best alternative to S-IPS.
What you heard are the pre-production rumors. Both FP241W and WZ are all using A-MVA panels. Some reviewer and a hardforum poster actually disassembled a WZ to confirm that. Also in the NCIX's FP241W and WZ weblinks, they specially specify both are using A-MVA panels.