I've got the OurArt Ti7, ToneKing TO200, and ToneKing TP16.
Without rewiring, the TP16 is Single-Ended(3.5mm TRS). It sounds good, and is very efficient, so it's loud when driven by lower powered sources, like phones.
I'm currently swapping back and forth between the Ti7 and the TO200, connected to the Balanced output of my DP-X1B DAP, listening to Google Play Music.
Both earbuds have a Full Foam over a Donut Foam.
Even though the TO200 is a 200Ω earbud, it doesn't appear to be harder to drive, and it does seem to have a warmer sound.