Sadly, the Mexican stuff here in the US is phosphate-free now and it's performance in hard water areas is crippled.
I went on a buying spree back in 2007 and bought up everything with phosphates the Mexican stores had.
Fortunately, I have enough Ariel, Foca, Nueve Blanca, and Viva to last me for years to come. The Viva is still my favorite.
Interesting about the Ace.
I wonder if the stuff sold in Mexico is still phosphated?