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CW feels more "exciting" and "fun" because the game is more fast paced. There are way more "playable" maps on CW than MW19, they even ruined OG maps. The balancing is better too. There's no variety in MW, everyone just used 725, M4, MP5, and riot shield.
It is fun, largely due to the gunplay feeling solid and familiar and the heavy burst of nostalgia with each pull of the trigger, but it doesn't do too much to excite at launch, largely down to most of the new modes not quite hitting the mark and a general lack of content.