I have recently listened quite a bit on the Slippery outtakes, as there are loads to listen to from SWW and NJ in terms of demos and outtakes.
I'm just a little curious if there is any hundred percent confirmed facts where they are from.

The Basement Tapes

These ones are obviously Jon and Richie demos from the basement probably somwhere between January-March 1986.

Pre-production Demos

It's a full band recording but considering in what early stage Prayer is in here, it has to be from the Century Productions-sessions done in the spring of 1986, when the band prepared and recorded material to send Bruce Fairbairn.

Studio Demos

Then we have the studio demos, at least that's what they are called on Youtube. Are these just from a later stage during the demo process in New Jersey, or ar these actual early stage demos from Vancouver.

Considering they didn't spend that much time in Vancouver it suprises me if they recorded demos there as well. Bon Jovi wasn't that big of a act back then, so why waste money on recordingin a professional studio with a producer and engineer?

My guess is that

1 - Basement Demos are Jon and Richie raw demos done somewhere between January-March 1986
2 - Pre-production Demos done at Century Productions in Sayreville in early spring 1986
3 - Studio Demos done at Century Productions as well but at a later stage. This is the one I'm most unsure about. Could be from Vancouver, but seems odd if that was the case.

Anyone that knows for sure, or anyone that has any guesses?