R11s for me, and in about 3 weeks I will be lvl 90!
Despite the warp speed meter the most important aspect is the spin. Depending on your Tier, the Bladez are great, but from longer approaches the spin is vital to hold greens. Whilst the forgiveness is marginally better with the R11 irons, this is offset by the meter speed.
I also prefer the distances offered by the R11 irons, will help on the long par threes (I currently use the G20s - 3 iron 215yds) instead of a 80% 3 wood and fits better with my 100 yard wedge.
For master and below the bladez, for legends the R11s - provided you (and especially me) can handle the meter speed and will take some adjusting to.