Actually, there are probably some Airbuses where it's lower too, since they'll be using "Vsr" and you're allowed as low as 1.13Vsr now.
The reason it will be varying will be one of:
(1) Some other requirement is overriding the V2min=1.2Vs requirement - such as V2min=1.1Vmca. At light weights you might be forced to respect that limit instead, which would give a V2 or greater than 1.2Vs. There are a number of different speed scheduling regulations, one of which is the 1.2vs requirement. ANY of them might apply.
(2) Choice. Higher V2 will usually give improved obstacle clearance or WAT limits, but at the expense of runway distance. They may simply have elected for a higher V2.
My money is on (1) if these are "standard" V2 numbers.