These are not even in the same league as the Ohlins.
Until you've experienced it, you won't understand.

Guarantee the Koni Sport would smoke those Petit whatchamathingeys.

They're even trying to jock the gold color off of Ohlins.

To your 'run of the mill' amateur, any damper that will have enough dampening to control a high spring rate will do. High spring rates can mask damper inadequacy.

You have 2 choices:
1. Buy knockoff dampers... the story ends, you wake up in your bed each morning and believe whatever you want to believe.
2. Get some Ohlins, you stay in Wonderland, and I'll show you how deep the rabbit hole goes.

I don't know how to put it any simpler; if the person selling you anything says 'don't be fooled by low prices' its shady. Consider the fact that Koni Sports for MKVs (for example) cost around $475 new, and they NEVER have to talk about their 'low prices' or 'don't be fooled by our competitors' or even 'we cut out the middleman'. If the Petit things were able to compete with the Ohlins, they would cost more because they would deliver more.

Motorsports is a game of money and talent. You have to use both to be the best.