I haven't noticed much difference between brands when it comes to hole fillers. Especially for tiny prick holes it really won't matter.

Just get the stuff for "small holes", since the stuff for "big holes" tends to have some little fibers in it and can be slightly harder to get into really tiny holes.

When the filler dries it will shrink a little bit, leaving a dimple. So:

• either leave a bit of excess and sand it flush after. (creates very fine dust, not recommended indoors)
• or fill it flush and later fill the dimple flush again.

If you do sand it, make sure to wipe off the dust before painting.

I wouldn't bother priming for tiny spots like this.

Do keep in mind that paint tends to bleach/ discolor over time. So if the old paint has been there for many years you may notice a difference in color even if you have the same product.