its not really about scares as it is about everything else. RE2 was just bigger in everything while improving all elements like environmental detail, area progression and advancing the story. more/better weapons, enemies, replay value ect. IMO its the definition of a perfect sequel IN COMPARISON to the first game. For me it was like an uncharted 1 to uncharted 2 scenario. the core mechanics are still there, but everything is improved.
this only got better as the series progressed, but i feel the games were more hit and miss in comparison to RE1 to RE2.