We are looking for upgrade for our small 10G network, and for that we need to hook up computer via optical link to 8-port 10G Netgear XS508M switch (it's mostly copper RJ45 switch, but one port is RJ45/SFP+). Plan is to pop in PCIe card (Intel X520-DA1) into computer, get about 10 meters of MMF optical cable, and get two transceivers, SFP+ LC SR (short-range) because we need to cover very short distance.
I am looking at prices and transceivers (same LC-MMF SR) have wildly different costs on Amazon. For example, Netgear's one is $300, Cisco sells same for $1200 or just $70, when what people call "off-brand" goes for $22
I wonder what is the difference and is there incentive for buying more expensive option? We did learn that cheap person pays twice, and use server-grade hardware as much as possible, however, for since transceivers have no moving parts, is it safe to pay up to 10 times less? Especially with combo of Netgear 10G switch (it seems that HP switches are picky)
PS: this text describes (rants?) price difference but only mentions that "higher OEM parts' price comes with affirmation of testing for compatibility" without much more details.