hi, i am not gonna tell you, wich one i prefer,, but i think, that for us, the us english and accent is more useful, 'cause we are here in america and most of the english speakers that come to our country are from usa and canada..... another thing i wanna tell you is that, i dont like canada style,,, right now i'm studying english in vancouver, and the guys here speak like "ronroneando" (jeje sorry for the spanish word, but i dont know how is the word in english),,, and besides canada's english, is a mix of many cultures, like italian, hindu, japanese, chinese...........and more asian countries, so its kind of different and hard to learn because almos the 70% of your classmates are asian, and they have Enormous pronunciation problems, because in their languages they never pronounce the R...., and another sounds, for example they dont say "I THINK". they say I Zhink.....and they will make slowly your learning proceses....