They look very good & I'll happily take one over the WG offering.
As for 'chipping', while it's a viable technique for adding interest to a paintjob, (I've certainly used it) it is very easy to overdo (not that it is on these examples). In fairness, most of the established 'weathering' painters in print (such as Mig Jimenez, Reuben Torregrosa or Adam Wilder) do all they can to state 'less is more', short of printing it all caps. Unlike scratches, which could conceivably occur on almost any surface of the vehicle, 'chipping' - intense localised wear, should only be applied on 'high traffic' areas of the hull/turret where many boots, hard edged kit or objects in the enviroment regularly rub (& exhausts where I suppose it could be better refered to as blistering/flaking).