I’m a seller, too, with the same sales figures.
BUT the sample (number of days) is too small to draw conclusions, in my opinion.
To compare sales, you need at least a sample of 1-2 months minimum for the 2 platforms.
I have a hunch it will be lower (poor search, consumer trust issue, no review…), but it’s just a hunch for now.
And BTW, I think Epic knew it was going to be rough since they don’t take royalties until the end of the year… It wasn’t charity…