As AnEv942 said, the problem the two examples are like comparing apples and oranges. The 10 for $26 AnEv942 no regulation to control the varying voltages we have in our rigs. 12-14.x volts.
Some folks have had trouble with the non regulated led lights... They will not just fail right off the bat.. It may take a few months before they die. Led's do not have the 10,000hrs life when pushed with high end of the tolerance current/voltage.
A clickable link to the cheap ones:
http://www.ebay.com/itm/10-PCS-Warm-White-Car-RV-Trailer-1156-BA15S-5050-18smd-LED-Light-Bulb-7503-1141-/301144033768?pt=Motors_RV_Trailer_Camper_Parts_Accessories&hash=item461d9549e8&vxp=mtrJim