Comparing Dish Mexico to the Dish Network is an apples/oranges situation. Other than the word "Dish" they have nothing in common. For English speakers, both US and Canadian, the common solution is either Dish USA or Shaw Direct.
The recent replacement of the satellite at 119 W has caused some problems because of it's more tightly focused footprint. Yet in eastern Mexico, i.e. Cancun and the Mayan Riviera, a little pointing and perhaps an upgrade to a 1.8 meter dish brings in Dish USA very handily. Both 110 and 119 come in quite well. Shaw is also a valid choice, with a very solid signal footprint..
I know of no reason to subscribe to Dish Mexico as its lineup is inferior to Sky's.