There is no such thing as "Ludwigia peruensis" in the scientific literature. It's just a made up nonsense trade name. The correct name for that plant is Ludwigia glandulosa. If your plant has alternate leaves (one per node), it's that. If opposite leaves, it's Alternanthera reineckii. Just hard to tell for sure from the photo.
The 'super red' appears to be palustris, not repens. But some flowering material would make it easier.
It it confusing since lots of plants are called alt names. But yes, the one it front I purchased as "Ludwigia peruensis" from ModernAquarium, in fact just ordered a few more bunches of it. I had found a few nights ago that its scientific name is Ludwigia glandulosa. I also have Alternanthera reineckii, both regular and "mini" varieties in the tank and it isn't that.