For all (or most?) British, Australian, New Zealand, South African speakers, they are pronounced differently, like this:

Oral: /ˈɒrəl/
Aural: /ˈɔːrəl/

Which in my Australian accent come out something like:

Oral: [ˈɔɹəɫ]
Aural: [ˈoːɹəɫ]

The American descriptions of how to pronounce these make no sense to me. All of these "o", "a" and "au/aw" sounds are handled very differently by Americans/Canadians.

For us, "oral" does not begin with the same sound as "or". It begins with the same first sound as "octopus" /ˈɒktəˌpʊs/ ... the "short o" sound, the vowel sound in "cot".

"Aural" DOES begin with the sound of "or", which is also the sound of "awe" and the first sound of "audible", "awesome", "awful". For us, the letter combinations "or", "au" and "aw" are usually pronounced the same way, the vowel sound in "caught".

For some in the US, who pronounce "cot" and "caught" the same way, this is not going to make any sense.