On my F650 Twin, we've been happier with the E09 than E10. The E10 got comparable mileage as a TKC. The E09 wears longer than a TKC, probably 7-8K miles.
I would put another E09 on, but not a E10 (no benefit over a TKC).
- The E10 is a really nice clearing mud tire (rode through New Mexico mud), and it didn't clog compared to all the other tires
- The E09 is VERY slick on wet tarmac (wants to step out)