The B14's are listed as compatible with the 208. They bolt to the hub and the brake disc dimensions shouldn't really come into this. The springs on the B14 are soft, which is perfect for daily use but if this is a track day focussed car you might want to fit some slightly stiffer springs to the kit.
FYI - The GTi has the 302mm disc and we see people fitting the B14PSS, KW var1 and KW STX kits to these.
Note that a 30mm+ drop is a little too far on this IMO I'd stick with around 20mm-24mm to maximise handling.
The key is to ask about compatiblity when you buy it, if they say yes and you have trouble fitting them you are entitled to a refund, although you get a full refund anyway in the UK within a short time after a distance selling purchase online if you return the product in good condition.