MTO? Showdown? Or both?

[OlSkoolE63_PSN]

I'm a little confused....
I've been grinding Affinity and have 5 FOTF players: Moncada, Gleyber, Tatis Jr, Merrifield and Gallo. I was going to stop after getting the FOTF cards I wanted but then it dawned on me that with a little more grinding, those team Affinity cards may have some good surprises. I see some folks do the Showdown and some do MTO for Affinity points.
I did the Padres Showdown and when I won, I thought I hit the Lottery. But all it got me was 4 vouchers. But as I type this, I now see that I got 4 vouchers for each team(except for the Padres) which I used to reach 70 Affinity points. Nice. All this this say, which is better for grinding, especially the last 10 or so points to hit 70. SD or MTO? Thanks

[beanball0571_PSN]

MTO is a day grind but it is free and can get u the points you need to unlock the cards