Update on t-zone oiliness: Laura Mercier powders

I'm trying to say good-bye to a shiny forehead so I've been testing two Laura Mercier powders that I got at the beginning of the month: the mineral finishing powder 1 and the loose setting powder in translucent.

I've tested two skincare+makeup combinations:

1.

Estée Lauder's Resilience Lift Extreme for dry skin

MAC's Studio Sculpt foundation

Laura Mercier's mineral finishing powder

2. 

Clinique's dramatically different moisturising gel only on the t-zone 

Resilience cream applied to rest of the face

MAC's Studio Sculpt foundation 

Laura Mercier's loose setting powder 

The results have been similar. And very positive. With #1 the shine on the forehead at lunchtime (4-5 hours after initial application) is controlled, I would say. It's definitely not matte, the way I like to have it, but it looks fine. Therefore if I used the oil-free gel and this mineral powder, I would get even better results.

One sunny day last week I was busy all day - doctor's appointment, lunch appointment, shopping - and didn't bother with touch-ups. Eight hours after first applying everything as per #2, I just used an oil-absorbing sheet on my forehead... and didn't even (need to) re-apply powder.

Conclusion

Basically, if I'm going to use a rich face cream all over, I need the mineral finishing powder because this controls sebum production. 

If I use two different skincare products - an oil-free product on the t-zone and a richer cream on the cheeks - then I can stick to the loose setting powder... but the mineral powder will be even more effective.

I like both powders but am undecided as to which one I should get a back-up of (!). You get a lot more for your money with the loose setting powder (29g vs 12g for the mineral powder!) so I am tempted to stick to this one. But the mineral finishing powder is so incredibly silky and fine, it's a dream!

Have you tried either of these powders?