I suppose the Jiayu does have one or two benefits over the Coolpad in the greater amount of memory and the compass. Not sure how useful the compass will be to most but I suppose more memory is useful (though 8GB is fine with me as I have a 64GB microSD card).
I've heard one or two complaints about the build quality of other Jiayu phones in the past but it sounds as though this one is OK.
I've been impressed with the software support from Coolpad (albeit with the ROMs only being released in China). It has proven pretty easy to 'convert' the ROMs for the TD-SCDMA Chinese version of the phone for WCDMA which gives us a lot more choice. Not sure how good Jiayu are at releasing updated ROMs? They are an established company so they may provide relatively frequent updates. Hopefully, both phones will have a KitKat ROM before too long!
All in all, I'm impressed with the performance of the MT6592 in the Coolpad so I expect the Jiayu you are looking at ought to be similarly good, providing you can get the glitches fixed.