Sorry for all the recent questions: Just getting back into model making and have not used many of these techniques before.

I am confused why you should use oils vs enamels for filtering and streaking.

In the articles/videos I've seen:
To filter:
Dabbed-on oils are blended with white spirit into a translucent 'filter' layer,

To obtain various streaking effects:
Thinned enamels are painted in small streaks then again blended with white sprit into a translucent 'filter' layer.

I realise the difference is that the filter is a much more subtle effect, but the types of paint seem to have the same effect.

So could you paint streaking effects just as well using oils, or filter using enamels?

Personally, I prefer oils for filters and in most cases also for streakings, becuase they allow much more control (longer drying time) and very subtle effect. Enamels dry faster and it may more difficult correcting mistakes. I use enamels for more consistent effects.

Enamel and oil is basically same type of paint, the enamel washes you see advertised all over the place has a high content of oil paint so as to be able to be stomped.Enamel paint on its own has a lot of filler to get a matt finish problem with this is when you thin it with white spirit it can washout causing it to look grainy, oils don't have this problem but take longer to dry.
One more thing oil/enamel weathering must be done on acrylic.

Like the other awesome posters above me said.

Enamels are pretty much just faster drying oils

For washes and pin washes I really like enamels.

For filtering and tweaking the base color, oils are amazing