I found this thread after googling what the differences between Maxit and Mega TV 3 are during a live chat with VM.
They just said I won't get any less channels, only more. I asked which ones are extra they sent me a link to channel list: https://www.virginmedia.com/virgin-tv-edit/tips-and-tricks/virgin-tv-channel-guide
When I asked what is MegaTV3 on this... is it 3-FullHouse, they said it isn't. MegaTV3 isn't listed on this, so really helpful.
They insisted that I will only get more channels so I said OK. Then they randomly said I wouldn't get BT Sport any longer, that's now a separate add-on. Oh so I will get less? They are so utterly confusing. I still can't see what is extra but have just given up trying to find this.
Anyways then after agreeing a new package for 18 months they processed it as I was reviewing the PDF contact, in which I noticed a price increase after 6 months that they didn't mention!
That's now a second renewal in a row where say one thing in chat and the final contract is something different, where you can only find out the correct details/cost afterwards.