Velocity is a MUST or you don't get the opportunity to C at any level higher than HS. Once you get the opportunity, technique is what will separate the better C. I highly doubt a "game" pop is 1.88. If you look at a PG Video of the best C, they lunge forward to go get the ball and stride to where their lead foot is probably over the plate to make the throw to who know where it may end up. In a game, the better C will receive the ball to not give up the potential strike and then throw to the bag.
Stealing bases in a game are determined by many variables such as pitchers release, wind up, type of pitch being thrown and are reasons why the best catcher only throws out 28-32 percent of stolen base attempts. The “Game Pop Time” is more important! The C with a 2.0 pop on the bag will use a combination of Velo, transfer and footwork and will be more successful throwing out runners.
IMO “Pop time” is an over rated statistic when evaluating a catcher’s skill set. Is the "1.88" pop on the correct side of the bag or too high? If the ball isn't at a position to have enough time to tag the runner what good is it getting it there quick? If the guy with the 1.8 can’t find the bag he is no different than the 6.3s 60yd guy who can’t get on 1st to even steal 2nd.