Not necessarily ... there is no "in house" test standard unless the filter maker doesn't test to any published filter test standard and they "wing it" on their own ... but no big name filter brand is going to do that. Some off the wall branded filter might.I suggest that the in-house minimum standard for the flagship is higher than the generic.
I will never buy oil filters that do no reference ISO 4548-12 test info, which doesn't actually set minimum requirements. The only test standard I know of that actually set minimum test performance standards is USCAR-36. In the oil filter world, there is no standard that they HAVE to meet, so it's up to the customer to figure out which test standard was used and what the results were on the filters they want to buy.