Prob nothing wrong with the cheaper one. But, note the 'sitting flat' part. The device likely needs to be heat-sinked carefully to avoid blowing out quickly. Make sure mating surfaces are clean and contact is uniform. If heat-transfer compound is provided, use it.

Steve

__________________
'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7