So even though they are the same company, ram, speed, timings and size but they only have 8 chips instead of 16 chips on the sticks it means they arent identical and wont run properly??? I mean thats pretty much a scam. There is not other way to find out that they have 8 chips instead of 16 chips when you buy them
There can be different configurations like 64x16 and 128x8 to achieve the total ram size, but 64x16 and 128x8 do behave differently, hence the discrepency in the access speed.
This has always been true before it was 32x16 and 64x8 for 512mb sticks. More mb per chip means cheaper not better.