For the Script. How to know if the dub is using the 4Kids Entertainment dub? Simple. If they mentioned this. The Heart of the Cards, and lo, Grandpa mentioned it! Plus, one thing I hate about this dub is that they tried their best to make it so Filipino that some words felt "left out." An example is when Yami Yugi mentions this line, "Pinaghirapan ni lolo na gawin ang barahang ito." I was like, WTF?! If I would translate it in English, it would sound like this, "Grandpa took the time and effort to make this card." If my memory serves me correctly, the proper term would be DECK. If there is no Filipino equivalent for deck, then retain the word deck and not try to translate it. That simple!
For the voices. I got to admit, Kaiba's voice is better compared to the original Filipino dub, and what fan girls would say, "smexy", but when he is going evil, the voice doesn't fit. Original Filipino dub wins.
For Joey, the GMA dub did a better Joey. End of statement.
For Grandpa, I prefer the original Filipino Grandpa dub.
For Mokuba, the GMA dub did a better job in Mokuba. In this dub, he sounds sweet and innocent but in the original dub, there's a little bit raspy-ness in the voice which is forgivable.
Now, for Yugi and Yami Yugi. Yugi's voice is almost, I repeat, almost similar to the original Yugi voice in the original Filipino dub... BUT maybe because of the dubbing in the studio, it felt like his voice changed drastically. For Yami Yugi, when I first heard his voice, I was surprised. He sounds like Narukami Kenji/Ryukendo in the Filipino dub! But when I heard his voice continuously, he didn't have the heroic feel like the Yami Yugi's I heard, namely Jeff Utanes' Yami and Dan Green's Yami, heck, it didn't even reached the heroic-ness of littlekuriboh's Yami!
Overall, if you want to kill time or you are pissed with someone, I would recommend you to watch this dub if you want to rant on something... or you are late on starting with Katekyo Hitman Reborn. On the side note, on their new anime ad, instead of Yugi's picture, we have Yusei's picture! Good Lord, please, don't tell me they got 5D's.