As someone else mentioned, depends what you are going to need it for.
Frequency, duty cycle, locale (are you anticipating airing all your tires up and down miles from civilization).
It's always going to be more convienent to hit a tire shop or service station for air than using a baby compressor.
Viair compressors are good quality and they work, but IMO not practical for regular use.
Also depends if you have AC power generator or hookups. Then a 120v compressor seems more practical if you have the space.
If your just equipping your truck like an Overland vehicle for the "what ifs" then I'd get the cheaper one.