Shockwave games vs. Pogo games?

[Adacia]

   I was wondering if shockwave and pogo are competing each other. I have  been noticing a similar pattern with the two. I have bought a few shockwave games in past and get their newsletter. It seems like whenever pogo releases a new game shockwave releases a very similar game.
   When jigsaw detective was on the 'coming soon' list, shockwave released a detective game. I forget the name, but the rules were almost a clone of jigsaw detective. Shockwave also released a new word game right as pogo announced wordjong.
    Now that talk of 'gonzo pizza delivery' has surfaced, shockwave has a new pizza delivery game out. Also, they have dropped the price on a few of the same games pogo has.
    I know there are other examples I cannot think of off the top of my head. It just seems like one is trying to copy the other.