I've never really noticed a difference between either heat source.
Now if freezer section is Cold (0-10*F) and food section is NOT getting cold enough (below 42*F) then you very well may have a plugged/blocked cooling unit.
Only cure for that is replace cooling unit or new fridge.
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31