Dutch to English Law/Patents Construction / Civil Engineering

The conundrum I'm trying to resolve here is whether "afbouwgarantie" is essentially the same thing as "uitvoeringsgarantie"/"nakomingsgarantie" (= "performance bond"), or whether there's some nuance I'm missing. Part of me can't help but think there must be a reason why these terms exist alongside each other (and I can't find any source that confirms they are synonymous).

But then when you look at what an "afbouwgarantie" actually entails (see here, for example: http://www.z24.nl/ondernemen/wat-als-je-aannemer-failliet-ga... that pretty much matches the definition of "performance bond" (see here under "performance bond": http://www.designingbuildings.co.uk/wiki/Bonds_in_constructi... elsewhere, Danske Bank says that "Performance bonds are usually issued for 10% to 20% of the contract value").

. . .and then there's the different can of worms of whether it's a "bond" or a "guarantee". It seems clear that it's not an *on-demand bond* (i.e. a breach of the primary contract must be demonstrated before payout is possible), but then beyond that usage seems to get fuzzy. My client's style guide uses the umbrella term "bank guarantee" and then calls the different types ("vooruitbetalingsgarantie", etc.) bonds, but then ING, for example, doesn't follow that same logic: https://www.ing.nl/zakelijk/financieren/andere-kredietvormen...

Hmmmm.