To be fair, I'd agree with the first bit, but the second bit isn't necessarily true, or even, really, relevant – they're both very strong.
Honestly not trying to stir sh1te BUT…
If you're a "harsh" rider, you ride "proper" terrain a lot, and you're comparing e.g. a DB Alpine to e.g. an old 4130 Inbred and the most important factor in buying a bike is that it doesn't break, then sorry but of course it's relevant. Hence, since the OP has asked about differences, it is at least worth stating that 853 is stronger than "standard" cro-mo, simply because it is (the buyer may or may not think this is important).
As it is, I'm sure that the Blue Pig is strong enough and, based on feedback, is a great bike. It certainly looks the part… there was one at the Trans-Provence.