I think the standard metal ball just looks better.
Edit:
So played the trial version and it looks like PvZ has very long ball times. Played it over and over and never lost a ball. Not my cup of tea as I prefer short challenging tables.
I noticed that the leaderboard and achievements worked right from the start...
That said I think PVZ for ZP2 is trying to lure more fans to virtual pinball. I don't blame them for making the table easy. I'm not a pinball wizard but I would like tables that are a bit more challenging. Fear Itself, MARS, Iron Man are Just that I think. Even Excalibur and Earth Defense can be a challenge getting all missions done.