Which seed mix should I buy for breeding, out of these 2.

[finchbob]

Versele-laga Tropical Breeding Mix 20kg
Ingredients

Yellow panicum 36 %
Yellow millet 28 %
Canary seed 16 %
Japanese millet 10 %
White millet 4 %
Niger seed 4 %
Red panicum 2 %

or

Versels-laga Standard Tropical Finch Mix 25kg
Ingredients

Yellow panicum 48 %
Yellow millet 33 %
Canary seed 8,5 %
Red panicum 6 %
Red millet 3 %
Niger seed 1,5 %

The top one is a bit more expensive and has only 20kg instead of 25kg. I have gouldians, bichenos, hecks, zebras and bengalese and plan on breeding them (most are a bit young still).

I usually get the standard mix but they recently added this so called "breeding mix" and I have no idea if it's really worth the extra cost or not.

[CandoAviary]

The difference is the amount of protein opposed to the amount of carbohydrates of the seeds contents. Most breeders accomplish this increase in protein buy suppling eggfoods, soaked/sprouted seed, bugs, or a combination of these.
I add high protein seeds like canarygrass seed and sunflower nut chips to my regular finch mix to bring the flock into breeding condition after a leaner winter diet. (much like the Auster Diet that is popular these days.)
I like to keep these different seeds on hand so I can readily create diets for different needs of the birds, such as, resting, breeding, molting, fleging. Tweaking the balance of proteins can have dramatic effects on the birds.