The answer is there is only one hit on scifinder for the preparation/reactant/reagent/etc of this compound;
(Cycloparaffins fused with heterocyclic rings. Part XXXII. A convenient synthesis of 2- or 3-alkyl- and 2,3-dialkylpyridines and cycloalkenopyridinesFull Text
By Epsztajn, Jan et al
From Polish Journal of Chemistry, 54(2), 341-7; 1980),
and the reaction in the question has more than likely never been done (i.e. it hasn't). So you can write whatever you please as the answer to this question (although I think there will be no difference between the two aldehydes). It is a stupid question, and the answer to it is clearly not obvious.
Basically be suspicious of everything you read because there is a lot of nonsense out there!