Choosing a home to rehab and flip

My family is looking to flip a house and the realtor showed us a 40k dollar house where we would pay the seller 8k to assume the 40k dollar mortgage.

The house was a wreck, the layout wasn't weird, the rooms were small, and it was built 1948.

We found another property built 1907 on the market for $29,000. The house looks sturdy but old and is in a historic neighborhood.

Our Realtor says the market in the historic area is slow and,
the comparables for the other house are dropping in price from not selling.

Which house would you choose?
Or, should we move on from both?