Those white doves are definitely a RC, we've had them here since last summer and they made a come back a few weeks ago. They are big chunky pills that crumble easy, similar press to the speckled doves but thicker and a different texture.
There is an unbelievably quick come up and intense high but a grim comedown, its practically impossible to sleep afterwards and every muscle in your body is uncomfortably tense. Most of the people ive spoken to who've had 3 or 4 plus get really bad depression, paranoia and anxiety from them. They leave a slight chemical smell on your skin the next day. Most of my friends will still talk about how these pills ruined a festival last summer for us, they were great for the first day, not as good on the second and horrific by the third.
I only took them again a few weeks ago because id already gone out and couldnt get anything else, stuck to 1 and a half and had a great night with minimal after effects so id definitely recommend going easy on them, just because they arent mdma doesnt mean they arent serious pills.