Following his role as co-driver to Lee Holdsworth in the Pirtek Enduro Cup, Randle topped both practice sessions on debut in the open wheel series.
Since then his focus has been on tintops, with Friday's action his first official outing in Australia's newest open wheel series.
“It actually feels very similar to drive to my dad's sports sedan, the Saab sports sedan,” Randle told Speedcafe.com.
“The braking actually feels quite similar and the car characteristics also feel quite similar.
“I feel more confident in an open wheeler, and the power delivery is better.
“The sports sedan still has over 700bhp, but with a 900kg car (S5000) versus a 1400kg car, it's always going to feel better.
“These cars you can't really carry a lot of mid corner speed because they just don't have the mechanical grip, and it's a very hard tyre.”
Despite topping both of Friday's sessions, Randle feels he's yet to fully come to terms with the car.
A test day at The Bend on Thursday offered him his first experience heading into the weekend, but even still he spent much of Friday acclimatising himself to the car.
“I feel like I'm gelling pretty well between myself and the chassis,” he said.
“We're just trying to learn what the changes are doing with the car around here, how I'm feeling with what we're feeling and if I can feel those changes.
“Every session I'm doing I just find a little bit more in myself and get more and more confident with the car.
“The braking is something you have to get used to because they're long braking zones.
“We're braking sort of 150 metres at Turn 1, so it's enough that you can go for a pass and everyone wants to see great racing.
“But trying to understand that and how the car responds if you do quick down changes or slower down changes, if you get rear lock or what the front lock margin is like and trying to understand, even through the high speeds like the triple right hander.
“One thing I was trying to get my head around yesterday with the power delivery was that you've got a fly by wire system and it's not a really long throttle throw, and it's quite a light throttle.
“Trying to know at what point you might get a bit of wheelspin or how much throttle you really can give it is a bit tricky.
“It's a very quiet car. It's really quiet. It's hard to hear the wheelspin and it's hard to hear the engine.
“I mean, it's very noisy from the outside but from the cockpit it's quite soft, the sound is quite soft.
“That's another thing, trying to understand this tyre,” he added.
“No-one's doing their best lap on the first or second lap, it's usually the fifth, sixth, seventh or eighth lap where the tyre is at its best.
“So that's another tricky thing to get used to, but I think it is a good tyre because it lasts. It lasts a long time.
“Yesterday we were on 300km old tyres by the end of the day doing mid-42s. I think it's a good tyre for this category.”
Randle and the rest of the S5000 grid is back on track at 1005 ACDT for qualifying, followed by the first of the weekend's two qualifying races at 1345.