it's something completely different yeah, no hold + one preview + different rotation rules makes it so you pretty much have to learn a lot about this game specifically. kinda like if you were trying NES tetris yet this is also different from that. i do have a headstart because i used to play tgm on emulator like 5 years ago, and i was happy to see that after a few days of derusting i was doing good still
Source: wiktionary