This is a very good question and one that perhaps I might try to answer. best is subjective and frankly the real answer is which brand of film will solve your specific issue.
Llumar is a terrific brand and we sell plenty of this brand for cars and homes. Vista is the upscale version of Llumar as FormulaOne is for the LLumar car films. More heat rejection less reflectivity etc. etc.
The 3M car films are not in the same league as the LLumar Vista Films by a long shot.
On Flat Glass for homes LLumar meets the medium large missile tests as does Vista on annealed glass. 3M 's 4,5,6 ML Scotchshield films and Prestige Ultra does not!
Buyer beware. .
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