A:AnswerThe difference in RAM price may or may not be less, but generally speaking, I would guess that manufacturers buy their RAM in bulk, so it would be cheaper from them than elsewhere, but keep in mind that ALL RAM is at an all-time high price right now due to the demands of AI farms, and probably will not decrease for at least 1-1 1/2 years.
The level of DDR can be found in Specs. Required skill: reading.