ahh yes!
PinkiePieSwear is such a great pony music mixer <3 The two you linked are big faves of mine, as well. Some other tracks PPS has done that I absolutely love are 'Trixie's Good Side', 'Art of the Dress (Always Stressed)', 'Winter Wrap Up (Late Again)', and PinkiePieSwear ft Makkon - The Astronomical Astronomer's Almanac to All Things Astronomy' . I have many favourite pony mixes, including but not limited to: 'For the New Lunar Republic' (both original and 'Hymn to the Moon Vocal' remix) by Not a Clever Pony, 'Clouds' by Omnipony, 'Fluttershy & Rainbow Dash - Yay (Louder mix)' and 'At The Gala (20% Cooler Remix)' by SimGretina, 'Party with Pinkie' and 'My Little Pony (theme)' by Alex S, 'Becoming Popular' by Archie V..
that's all I can think of at the moment
There are always new remixes coming out, new artists popping up; I always look forward to the music posts on EqD