Many of the rights in the "bundle" convey with the execution of the contract, but not all. In this state, there is no deed transfer until the LC is paid in full so the 'owner of record' is the seller until that time. If this was a common method of sale in the area, I might use one as a comp but since the property did not actually 'sell' (ownership transfer) I'd be reluctant. If recorded, the assessor will note on the property record card that the transfer is LC. However, if the buyers fail to pay taxes it falls back to the actual owner. In this state if you record the LC the property is taxed as owner-occupied at 1% of value. If not, the assessor assumes its a rental and is taxed at 2%, hence the incentive to record the LC.
I've sold several properties in this manner. I had a lot of rentals and when I wanted to get rid of them I went to the tenant to see if they wanted to buy it on LC. No money down, keep the same payment, they pay taxes and insurance and repairs, five year payoff. It worked out well. They all eventually refi'd and they were happy homeowners.
A LC is different than seller financing. Seller financing is the seller taking a mortgage but transferring the deed at closing, same as most sales with bank financing however, in this case, the seller is acting as the bank.