The TrustFire MINI-02 is a nice light, no doubt. My musings are:
The 02 is heavier than the E09. The E09 (with eneloop) weighs about the same as 4 US twenty five cent pieces (about 22g). The 02 (with battery) weighs about the same as 12 US twenty five cent pieces (about 65 grams). I have an Ultrafire C3 in stainless steel. Gorgeous, but heavy.
You will likely need to use the 16340 battery to get the full lumens. See Problems with Trustfire Mini-02 on 16340 cells *Fixed* for a beam-shot comparison. Also note the comments about using protected cells in the 02.
I usually put a fresh eneloop in the E09 every other day. It is in my pocket continually and gets used frequently. I don’t own the 02.
This review of the Mini-01 can be helpful. Review: Trustfire Mini-01