I think either one could be directly wired into the freezer. I have a Love but never used a Johnson Controls. The Love requires that it be chassis mounted into something, either a box or the keezer wall. The Love controllers are very programmable, I have yet to mount mine, but I love the versatility of it.
Draft 1: Lightly smoked Weizen
Draft 2: Belgian Wit
Draft 3: Rauchbier
Primary 1: German Scwarzbier
On Deck: Belgian Brown Ale, Pale Ale, Stout