Same situation here, but opted to go with the mirage, due to the following reasons:
1) Mas maluwag ang cabin ng mirage
2) Mas fuel efficient due to cvt transmission
3) Tunog lata yung picanto when you close the doors, and the plastics of mirage has a more premium feel if compared to picanto.
4) i have a friend who has a picanto, and medyo hirap sa parts, medyo maghihintay ka lang, although luma na yung picanto nya.
5) malaki discount ng mitsubishi.

Yung wigo ok din, pero kung AT ang target nyo, mas fuel efficient parin mirage plus mas mura parin lalabas yung mirage after discounts.

Good luck and happy hunting!