AXi definetely has better quality. I've used Axi 2814/22 on my Hexa and have been super happy about it.
I'm also using Tiger motors extesively, MT2814-10, MT2820 KV830, MT2826 (KV550) and now waiting for some MN series.
MT2814, came with orginal Ezo bearings but I believe they are so sensitive...