The Rule of Thumb dictates that in IELTS, speaking is usually the highest score, whilst in PTE it is the lowest score. This has more to do with how the PTE test is marked and with the algorithms programmed into the computer and less about your ability to speak understandable English.
Cadence (rhythm), intonation, flow and pronunciation are vitally important in PTE, together with the observance of punctuation and emphasising the important words in a sentence. To this, you have to add the answer to the question – in a logical format. So much to juggle when under test conditions and with time restraints.
Therefore, it is imperative to talk to mother tongue English speakers to practice speaking naturally and correctly.
If you need help with your PTE or IELTS preparation, feel free to email me: firstname.lastname@example.org or go to www.sarahielts.co.za