cheaper vs less problematic
My guess is that it would depend upon what type of sailing you plan. The Tanzer is probably better if you plan on staying aboard more, since it''ll have more room down below. The Cal is probably a good choice if you plan on daysailing or, at most, an overniter or two, where accomodations aren''t as critical. The Tanzer probably has an older inboard that might require more maintenance down the road. Inboards, I believe, are generally more expensive to maintain than outboards; but I wouldn''t want an outboard for extensive coastal work. The Cal has an outboard so the expenses might be less.
I don''t think it''s rare for boats of this vintage to have some deck problems.
Your choice. (I''d get the Cal, but I''m mostly a daysailer.)