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Quoted from Dr. Timmothy Hain:

Labyrinthitis: "The vestibular nerve carries information from the inner ear about head movement. When one of the two vestibular nerves is infected, there is an imbalance between the two sides, and vertigo appears. The symptoms of both vestibular neuritis and labyrinthitis typically include dizziness or vertigo, disequilibrium or imbalance, and nausea. Acutely, the dizziness is constant. After a few days, symptoms are often only precipitated by sudden movements. A sudden turn of the head is the most common "problem" motion. While patients with these disorders can be sensitive to head position, it is generally not related to the side of the head which is down (as in BPPV), but rather just whether the patient is lying down or sitting up."

BPPV: "In Benign Paroxysmal Positional Vertigo (BPPV) dizziness is thought to be due to debris which has collected within a part of the inner ear. The symptoms of BPPV include dizziness or vertigo, lightheadedness, imbalance, and nausea. Activities which bring on symptoms will vary among persons, but symptoms are almost always precipitated by a change of position of the head with respect to gravity. Getting out of bed or rolling over in bed are common "problem" motions . Because people with BPPV often feel dizzy and unsteady when they tip their heads back to look up, sometimes BPPV is called "top shelf vertigo."

In summary, patients during the acute stage of labyrinthitis (the earliest and most symptomatic stage) experience continuous severe vertigo at the early state of labyrinthitis. As the swelling in the inner ear goes down, this vertigo is caused mostly by movements. If you never experienced constant vertigo during the early stages of your symptoms, then you probably dont have Labyrinthitis. BPPV patients experience episodic vertigo generally only caused by head specific types of movements. Some patients can experience rocking, lighheadedness, etc... But the key is movement, most likely looking up or down, or rolling over in bed. If your vertigo/dizziness can be caused by mostly certain types of positions, then BPPV is likely.