What's the predictions for 2017? A good season or just one team winning everything again?
"On the one hand we were sort of pleased to see someone else has done a similar thing, but on the other we were disappointed that we weren't the only team to think of something," Key said of the similarities to the Mercedes W08.
"There are many different concepts out there actually. The diversity is very obvious."
He underlined that the similarities between Mercedes and Toro Rosso were coincidental.
"I looked at the Mercedes and went 'Ah, they've got our front suspension,'" Key said. "Most people would say we've got Mercedes' front suspension.
"The nose is similar, the front of the sidepods is similar, even the bodywork on the sidepods is similar.
"It's complete coincidence."
One of the most interesting additions on that RB13 is the nose, dubbed 'the nostril vent' by Sky F1's Ted Kravitz.
"It looks like it's something to reduce their drag on the car," he explains. "Red Bull know their deficit to Mercedes is in the power department, so they need to make their car as low drag as possible.
"They can slip through the air easier than Mercedes. We'll see if they've managed to achieve that."
And they both immediately go faster - and significantly - faster again!
Bottas puts down a 1:24.654 before Vettel produces a near-identical 1:24.748
We're just 32 minutes into Day One of 2017 pre-season testing and we've already seen two laps faster than were set in the whole of the first day here at Barcelona a year ago.
For reference 2016 Day 1 Fastest Time:
1 Vettel Ferrari 1m24.939s
I do rather wish we had some place to see timed laps per car over the entire day especially long runs. That's usually where one can really tell who's got an advantage