The reduction of an aldehyde
You get exactly the same organic product whether you use lithium tetrahydridoaluminate or sodium tetrahydridoborate.
For example, with ethanal you get ethanol:
Notice that this is a simplified equation - perfectly acceptable to UK A level examiners. [H] means "hydrogen from a reducing agent".
In general terms, reduction of an aldehyde leads to a primary alcohol.
The reduction of a ketone
Again the product is the same whichever of the two reducing agents you use.
For example, with propanone you get propan-2-ol:
Reduction of a ketone leads to a secondary alcohol.