About Hebrew pronunciation

I know this isn't specifically to do with conlangs, but I was thinking
about creating a conlang based on Hebrew, and I decided to start studying
Hebrew.

I was wondering what pronunciation do most speakers use? The Sephardic or
Ashkenazic?

Also, do both the sephardic and ashkenazic tend to omit the glottal stop,
or just the ashkenazic? Also, do sephardic speakers omit the voiced
pharyngeal approximant ('ayin) in fast / casual speech?

Apart from the ashkenazic pronunciation not using pharyngeal consonants,
are there any other differences?
Thanks.

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