Help me decide: Grado Gold or AT440ML

I am about to change the needle in my Grado Gold cartridge (about $90) but I heard the AT440ML (about $90 for cartridge) might be a better tracking cartridge. I read someones comment that Grados and Shures do not tract so good on inner groves. I have an AR-XA turntable with at REGA RB300 arm. Which way should I go, buy a new needle for the Grado Gold or by a new AT440? Thanks.