Well, that depends entirely on your goals, current stats, and "needs" (estrogen or cortisol manipulation). Both are excellent products in their own right.
LeanXtreme is the more potent of the two for cortisol control but has zero anti-estrogenic activity. This stuff gets me peeled when dieting.
Erase is the only one of the two that has estrogen/aromatase inhibition attributes and also has some mild cortisol mitigating effects. I use this stuff while on TRT and have successfully replaced Aromasin use.