I’d guess they do relatively better because they have lower volumes (don’t some of them only do large parcels? I haven’t encountered them, other than DHL, much and it tended to be big items) and the wheels seem to come off (figuratively, the vans usually look sturdy, although I did drive passed an Amazon driver trying to change two tyres late Saturday - they clearly had had a long day and enough of this BS) when they try and push quantity, often at the cost of quality.