I have both the raster and vector NOAA charts loaded, but I use the Vector charts 90% of the time CE has a deal with CHS (Canadian Hydrographic Service) where you can get the official CHS vector or Raster charts for a very reasonable $$. Like for the US, I have both, but use Vector 90% of the time. The CHS charts as the same high quality as the NOAA charts.
Staying on the west coast, I think the only option for Mexico is C-Map, and as I have blabbed about elsewhere, I think they are downright dangerous. Not just unhelpful, but dangerous. MVWeebles post a few earlier citing the missing breakwater is a good example. That's the stuff that gets people killed, or at least sinks boats.
On the east coast, I don't think Rose Point has the same CHS offering as the west coast, though I think I heard they were working on it. When we spent time in the Canadian Maritimes, we used both c-Map and Navionics. I started with c-map and it was good, except when I got the the Rideau and zooned in, the chart disappeared. It turned out to be a c-map bug, and it forced me to buy Navionics for the same area which was annoying. But it was my first lesson on the value of having access to multiple chart sources. But as has been discussed, you can no longer get Navionics for CE.
For the Bahamas, at least back in 2012ish, only c-Map included the Explorer Chart data, and that's really the only good charting of the Bahamas. So I got c-map for that area.
Speaking of charts for CE, that's what lead me to buy it initially back in about 2010. We did a trip to South Georgia and the Antarctic Peninsula and I wanted to be able to view and record our route. As I recall, charts were available from Chile and the UK, both in the industry standard S-57 format, and of course CE supports that.