First off, what "other forum post" are you referring to? I'm asking, because you need to be careful what you're asking for here. I presume, first, that you have a TiVo - check on https://www.virginmedia.com/care/tv-fault/which-tv-box if you're not sure.
I would further presume that the offer you're referring to, is to swap your TiVo for a TV360. I would only recommend doing this if you're in full knowledge that TV360 is a fundamentally different TV platform to TiVo, and if you do indeed have a TiVo, then a V6 uses the same hardware but runs the exact same software as you're used to.
Neither TV360 nor V6 run the NowTV platform, which is Sky's "dip-in" way of selling their broadcast channels on a streaming basis. Virgin Media allow you to add those same channels to your subscription, if that's what you're looking for.
So it would be useful to know a) Which TV box you currently have, and b) What functions it is, that you're looking for? .