After all, both have the lead role in a crime procedural, passing themselves off as Americans.
Passmore takes the observations as a compliment.
"Obviously you're always going to get comparisons. But I've always said it's not a bad person to be compared to. He's a phenomenal actor and doing extremely well. I think he's better looking than I am, so hell, compare me to him all you want!" he laughs.
"The accent's never been too difficult for me, just a standard American. I was going to go into a South-Western Chicago accent. But the executive producers made the decision that they didn't want to make it that exclusive. So I put it a little bit more up in my nose, and threw a couple of things in, but it's not exactly authentic Chicago," he says.
He prefers to keep the accent all day on set so that it becomes second nature and he can focus on the work. But even guest actors are surprised to then discover he is an Aussie.
"You get a funny reaction even from crew, or people who had no idea. And then you break out into the Australian accent. They think 'Have you been trying to fool us?' There's a funny suspicion: 'Have you been trying to fool us all day?'
"It's not just an accent, it's a rhythm. It's not just your R's and vowels. There's a definite rhythmic nature to the American accent you have to embrace," he says.
"Sometimes we have guest actors and I'll be chatting to them, having a good time, and then at the end of the day I say (in an Aussie accent) 'Awesome! Great!' and there's always that little 'Have you been foolin' with me all day?' look."
"A&E; were actually nervous about getting back into drama but since this success they've been ecstatic," he says.
"They're predominantly Reality. All their award-winning shows have been Intervention,Hoarders and while it hasn't been award-winning Steven Seagal: Lawman rates through the roof. And there's Gene Simmons Family Jewels. So it was weird to think we were going to be a drama on it.
Passmore admits while the pay may be better in the US ultimately his acting jobs are driven by the work itself.
"Each time it's come down to do you like the role, do you like the story? And then are they going to give you the job? But the funny thing is, you never know where you're going to be," he says.
"You never know where the wind's going to blow.
The Glades airs 8:30pm Sundays on W.