Throughout my two weeks of testing, I did an A/B testing with the ZS10 Pro and the MH750 (modded, 16 core copper cable). I used the included ear tips and the included cable.
In terms of size, I find these to be a bit bigger than the zs10 Pro. The ZSX has the best fit out of all of my earbuds.
Cable is a bit odd.
I've never been so blown away with a set of earbuds upon first impressions. I wouldn't say these are extremely bassy earbuds, compared to the MH755. I feel like the bass on the ZSX are more pronounced. Vocal and instrument separation was very notable with this earbud. They do a very good job of producing small details that I've only been able to experience on the Tin P1.
Compared to the ZS10 Pro, there is more clarity on the ZSX. The ZSX produce better results in the upper end. Both have a similar quality in the bass.
Compared to the MH750, the ZSX has better separation, but there's more bass in the MH750 in terms of quantity. Bass is more pronounced on the ZSX. Upper end is also more pronounced and clearer on the ZSX, but there were times when I experienced a little bit of sibilance, something I don't experience with the MH750.
These earbuds are NICE for the price. Cable's a little wacky when it comes to how much these can get tangled up in a day, but the earbuds themselves are SOLID. If you are looking for a pair of earbuds to sit back and chill with, these would be my recommendations.