SNPV0M5RC 8G AB120718 DDR4 3200MHz

I've four of those 16GB/3200 1Rx8 Non-ECC from Transcend (SpecTek memory chips, JetRam JM3200HLE-16G modules) in Precision 3450 SFF.

Not really, I wouldn't call it "much" lower, just a bit,
when I was buying it - Transcend' web price was cheaper (not by much though) and Crucial was running "clearance discount" (-28% or something) from around $90/£75 (which looking at current price and the one followed shortly after - drops some shadow on honesty of their "marketing campaigns")

but if you check in a bit more details - Crucial isn't really saying what memory rank/density you will get (they vaguely specify both/three as options: 1Rx8/2Rx8 {plus 1Rx16 on latest due to industry standard changes}) effectively turning it into a gamble between marginally slower/faster memory, plus you might get lucky and receive all 4 the same modules (a bit unlikely outcome) or different ones (e.g. single rank and double in one set) effectively messing-up whole setup.

That's the reason I went for more certainty on target module speed/rank (single rank: 1Rx8) at extra premium (at current prices looks like from 7% to 10%, back then it was almost the same / gap nearly nil).

@sam55todd Just going by the website you posted, 8 GB of your memory is $42.99 and Crucial's memory is $30.99, almost 30% less the price of yours. 16 GB of your memory is $71.99 and Crucial'2 is $60.99, about 15% less. I have no way of knowing the price of memory when you made your purchase. Crucial's price is also much lower than the price on the links to Amazon and Dell memory mentioned here for 8 GB. 

If you are concerned about rank/density you should check with the manufacturer and to ensure compatibility you should purchase a kit and not individual memory modules. Crucial guarantees compatibility when using Crucial's System Scanner or System Selector.