"Alternative" 1/18 bl motors?

I've been running DualSky lipos in one of my MQs or Vendetta for a couple of yrs- they fit like they were made for the MQ or Vendetta batt compartment. They had one rated at 1700 and then things started to change. The next was called xpower was same size but only rated for 1500. They did go from 15C to 20C though. Now looking they've changed again, its now 1300mah but rated at 25C in the same size.

The 1700 never delivered that much, mine were always running 1400+ so the 1700 was prob optimistic. The 1500 was pretty much the same so I'm at a loss to understand the 1300 de-rating. I don't know if these qualify as "good" lipos, but they've worked for me. Apogee was supposed to come out with a "small form factor" lipo, but I don't think they ever did?

I was out of town for almost 90days earlier this year and all my lipos puffed at least one cell, so I've been slowly replacing them. I guess I'll try the 1300 and see what they'll do.