Only so far, mx2 is not helping me with mx1. I don't see any complex numbers or ellipses in mx1. Wait until we get to polynomials and curve sketching.
In my personal opinion, MX2 does help u with MX1 in a way, like it helps u to think more broadly, use so many methods u would hav not thought abt...and yeah, there is this harder 3U which help u much!
I remember once I was studying the past papers for MX1, then I came to this integration question which was also in the MX2 paper. My reaction was is this MX1? I seem doing MX2...
I like both courses, MX2 for the challanges and it provides me endless work and "headache" JK..LOL...but MX1 can be pretty challenging as well, tho' less than MX2...If I had to choose, yeah...I love MX1 since I did better in it... (how naive I am -_-!)