Is it true that the possessive form is not used for a noun which is being compared to by "that of" or "those of"? For example:

... making your products or services different from and more attractive than those of your competitors.

Also, could I use the possessive without using "that of" or "those of"? For example:

Lincoln's party is better placed to win the election than Roosevelt's.

Is it true that the possessive form is not used for a noun which is being compared to by "that of" or "those of"? For example:

... making your products or services different from and more attractive than those of your competitors'.

Also, could I use the possessive without using "that of" or "those of"? For example:

Lincoln's party is better placed to win the election than Roosevelt's.

Is it true that the possessive form wouldn't be used for a noun which is being compared to by "that of", for example:

... making your products or services different from and more attractive than those of your competitors.

Also, could I use the possessive not using "that of", for example:

Lincoln's party is better placed to win the election than Roosevelt's.

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Is it true that the possessive form is not used for a noun which is being compared to by "that of" or "those of"? For example:

... making your products or services different from and more attractive than those of your competitors.

Also, could I use the possessive without using "that of" or "those of"? For example:

Lincoln's party is better placed to win the election than Roosevelt's.