The first parse is with 1 less alacrity augment than the 2nd. My connection is stable and I sit at 15 ms. The second one was just above the alacrity threshold to reach 1.3 seconds on the gcd while the first one was slightly below. I've tried this for multiple classes (lightning sorc and marksman sniper) and found very similar results. I've also tried the same thing but with the threshold to reach 1.4 seconds and found the exact same thing for all of those specs. I've also had someone else test the same things and they've found similar results. The abilities that are cast/channeled that are longer than 1 gcd seem to round to the nearest .01 second which is unnoticeable but abilities that are instant or are exactly 1 gcd always act like it's rounding up.
Group Res & Healing Bonus enabled in both guilds now 😉
We now have Group Resuscitation so you can revive the entire ops group within 30 meters. Add it to your quickbar from Abilities->Guild. It works in all raid levels and PvP. Must be out of combat (Stealth classes FTW)