Bern has a fully-lined helmet or hardhat, right? So you don't have those little foam pads/strips, but beneath that all there is still an EPS hard foam core to the helmet.
By "weeny little foam pads" do you mean those little pads that are velcroed/glued to the interior of the helmet? That's not what matters. The actual helmet, beneath the plastic exterior is made of "foam" and in the case of Pro-Tec (venturing a guess here that they are still made similar to the old one I just threw out) this is very hard foam like what you would find in a mountain-biking helmet. If you look closely it resembles styrofoam. The little pads you describe are there to basically keep you comfortable when the helmet is not absorbing impact.
The helmet is designed to compress/get destroyed on impact, so as to mitigate/minimize damage to your skull (and it's precious, precious contents).
The soft foam (brock foam) according to Bern: Hard Hats with Brock soft foam do not meet the standards for action sport head protection
Honestly, I wouldn't waste my money on a brock foam helmet. If you're going to go that route, you might as well not wear a helmet.
Last I knew, Bern only
makes hardhats...I had an issue with one a few years back, so I had a pretty in-depth conversation with the customer service rep, and I consider myself "fairly" knowledgable about their different types of foam.
Technically, Pro-Tec is a "hard hat" as well; at least their skateboard stuff is (plastic shell with pretty compressible foam pads)...those are the little weeny pads I was referring to. I haven't looked close at their snowboard helmets.
Bike helmets have EPS foam...as do Smith and Giro helmets. Those meet the CPSC standard for protection single-hit/action/snow-sport protection...I forget the exact testing criteria, but they drop a certain weight from a set height in the helmet and use an accelerometer to see if it stopped slowly enough...and that's a hard, rigid foam.
However, the Bern hardhat I just bought has a pretty dense foam shell, but it's not EPS...it's compressible, but firm. IIRC, that (Brock?) foam is designed for "a few" hits...it's not a single-hit helmet, but it's not necessarily a multi-hit in the sense that a Pro-Tec or 888 might be. In my personal opinion
, I'd trust the Bern one more than a Pro-Tec or 888...which is partially why I went and bought a Bern, instead of using my 888 or comparable helmet.
Bear in mind though, 95% of my helmet knowledge comes from bikes and skateboards...not really sure how much of any of that translates into winter sports.