Why do dictionaries give me different pronunciations?

Question

I'm looking up in various dictionaries for IPA phonetics of words, but some dictionaries give me different pronunciations for "ei".

For example, lets look up for breit:

• Hueber and adaba say it is pronunced: [braet]
• Collins, Wiktionary, Pons, thefreedictionary and Oxford say it is pronunced: [brait]
• Duden gives [breit]

Answer 1

Outside of IPA many companies and organizations use their own system to express phonetics, so somewhere on their website there should be a key to their pronunciation system.

One thing I noticed is that Hueber is seated in Munich, adaba are from Austria. Therefore some influence from Bavarian dialect may be the cause of a different pronunciation recommendation, even though in Bavaria "breit" is pronounced more like [broàd].

Duden, and Pons both reference the "ARD-Aussprachedatenbank", which is the standard pronunciation recommended for the TV stations.

Answer 2

It seems that they just chose a different representation for the same diphthong. You may want to read this paragraph in Wikipedia, even though it lacks a citation.