> So I saw a comment once which suggested all intel cpu's are the same and they just disable certain features before its sold.

Really not true. What happens is that during manufacturing of a particular design, you get a distribution - not all units will have all features working. They analyze the data, and partition the units into segments based on (common) features that do work. Those on the tail end of the distribution (on the positive side) are the most featureful and sold with a premium. And so on from there.

If they actually tried to manufacture different CPUs for high and low end features, then each of those would have their own distributions, and they'd waste a lot of units for not meeting the spec. This way they can simplify the production and not waste the units.