The photo below shows the ordinal filter that came with the machine on the right and the pillow the DME sent (complimentary) on the left

I noticed that the original one is different in that it has a sturdier back to the filter, the replacement pillows are the same texture all the way through. Blue is supposed to mark the front right? i wonder why they bothered marking the blue side in the replacement pillow as it does not seem to make any difference which way it goes in? Anyone know if these filters are any good? are they they the same as the ones sold on cpap.com?
Its seems the original filter caught most of the dust at the back of the filter? and thus the replacement would just be letting more dust through
Also although the original pillow does not seem to be too dirty i did hold it in one and and then flicked it with the other. I was very very shocked at the dust cloud that shot out from it, not just once but about 5 or 6 times I will be changing my filter monthly from now on.