Yes, they do. Even for the wondrous effetcs.

So, for wondrous effects, you can have +30% from one ressource, and and other +15% from an other ressource, ontop of the base benefits.

Having a lot of sage early on for example, or marble, can be quite usefull as the bonuses are flat, yet very usefull. The sage ensure you have a decent population base, and the marble, well, it allows you to worship Artemis (and make your workers do more working, with a +1 indu per worker per marble if my memory serves right, which is gud).

Edit : having a bunch of ressources is also the "better way" to improve you stability, because you do it with an investment that give you stab everywhere and with an added bonus, which is nice.

In general, I buy everything except when I want to avoid spreading of influence or religion for example, as it seem that active trade links tend to have an impact.